Every wheel must match your vehicle on all five of these parameters:

Even if wheels physically bolt on, wrong offset or centre bore creates vibration, premature bearing wear, and potential WOF failure.

📞 Contact us with your vehicle details and we'll confirm which wheels are compatible.

🔧 See our complete wheel fitment checklist (Q65) for a step-by-step guide.

PCD (Pitch Circle Diameter) describes how many wheel studs your car has and how they're arranged. It's written as number of bolts × diameter in mm.

Common NZ examples:

You need to measure the bolt circle diameter — the imaginary circle that passes through the centre of each wheel stud.

For even-numbered patterns (4 or 6 bolts): Measure centre-to-centre of opposite studs. That's your PCD.

For 5-bolt patterns (most common in NZ): There's no directly opposite stud, so:

1. Measure from the centre of one stud to the far edge of the stud two positions across
2. Or measure centre-to-centre of two adjacent studs and multiply by 1.701

For precision PCD measurement, especially when identifying unknown wheels or confirming compatibility:

Method 1 — Vernier callipers (most accurate):

1. Clean the studs/bolt holes thoroughly
2. Measure the inside diameter of one bolt hole
3. Measure from the inside edge of one hole to the outside edge of the opposite hole (for even patterns)
4. This gives your exact PCD

Method 2 — PCD template (quick and reliable):

• Print a PCD template from online — these have common patterns pre-drawn
• Hold against your hub and see which pattern aligns with all studs
• Double-check with callipers if between two close sizes (e.g., 114.3 vs 112)

📞 Contact us with your vehicle plate number — we can look up your exact PCD in seconds.

Offset (ET) is the distance in millimetres between the wheel's centreline and its mounting face. It determines how far the wheel sits in or out relative to the hub.

Three types of offset:

• Positive offset (e.g., ET+45): Mounting face is towards the outside of the wheel → wheel sits closer to the body. Most factory cars.
• Zero offset (ET0): Mounting face is exactly at the centreline
• Negative offset (e.g., ET-10): Mounting face is towards the inside → wheel sticks out further. Common on widened 4WD setups.

Wrong offset consequences:

• Too much positive → tyre rubs inner guard, suspension contact
• Too much negative → tyre sticks past guards (fails WOF), increased steering effort, premature bearing wear

The hub bore (or centrebore) is the large centre hole in your wheel that sits over the raised hub on your car. It's measured in millimetres (e.g., 67.1mm for many Toyotas).

Why it matters:

• A perfectly matched hub bore means the wheel is hub-centric — the hub carries the weight, not the bolts
• If the wheel's centre bore is larger than your hub → you need hub-centric rings
• If the wheel's centre bore is smaller than your hub → the wheel physically won't fit

Common NZ hub bore sizes:

Hub-centric rings (also called spigot rings) are plastic or aluminium adapters that fill the gap between an oversized wheel centre bore and your smaller vehicle hub.

Example: Your hub is 67.1mm but your aftermarket wheels have a 73.1mm bore → you need 73.1 → 67.1mm hub-centric rings.

Why they're essential:

• Without them, the wheel is "lug-centric" — all weight sits on the bolts alone
• This causes vibration at highway speeds (typically 80–110 km/h) that no amount of balancing will fix
• Increases stress on wheel studs and can lead to premature stud failure
• Makes wheel fitting more difficult — wheel won't self-centre on the hub

Yes — but only to make it larger, not smaller.

If your wheel's centre bore is too small to fit over your hub, a machinist can carefully bore it out to the correct diameter on a lathe. This is a common practice for adapting high-quality aftermarket or OEM wheels from other vehicles.

Key considerations:

• Material removal is permanent — this can't be undone
• Must be done by an experienced machinist with proper wheel-holding fixtures
• Typically costs $30–$60 per wheel in NZ
• Don't remove more material than necessary — excessive boring weakens the hub area
• Steel wheels are easier to machine than alloy

If the bore is already too large: Use hub-centric rings instead. This is the easier, cheaper, and reversible solution.

Your rim size is typically found in several places:

1. Stamped on the wheel itself — look on the inside of the spokes or behind the wheel near the valve stem. You'll see something like "17x7J" or "16x6.5J ET45"
2. Vehicle owner's manual — lists original equipment wheel specifications
3. Door placard — usually on the driver's door jamb, shows tyre size (from which rim diameter can be confirmed)
4. Online databases — search your vehicle model on fitment sites

A typical wheel marking reads something like 17x7J ET45 5x114.3 CB67.1. Here's what each part means:

You may also find: date of manufacture, load rating, and safety certifications like JWL or VIA (see Q17).

"17x7J" means a 17-inch diameter wheel that is 7 inches wide with a J-type flange profile.

The letter(s) after the width describe the rim flange shape — the lip that holds the tyre bead in place:

Does the flange letter matter for tyre fitting? For most passenger car applications, J and JJ are interchangeable with the same tyres. The tyre bead seats slightly differently but both seal correctly. JK and K flanges are purpose-built for commercial and heavy-duty applications.

Every tyre has a recommended rim width range. Too narrow and the tyre bulges dangerously; too wide and the bead doesn't seat properly.

General guidelines:

🔧 Tyre Size Calculator — enter your size to see exact recommended rim widths

Based on our sales data and 84,000+ vehicle fitment records, here are the most popular rim sizes across NZ:

R16 and R17 dominate the NZ market — more tyre choices, better pricing, and wider availability. If you're considering a wheel change, these sizes offer the best value.

🛒 Browse tyres by rim size: R15 | R16 | R17 | R18 | R20

A wheel load rating is the maximum weight a single wheel is designed to safely support. It's usually stamped on the back of the wheel in kilograms (e.g., "690kg" or "Max Load 1520lbs").

How to calculate the minimum you need:

1. Find your vehicle's Gross Axle Weight Rating (GAWR) — usually on the door placard
2. Take the heavier axle (front or rear) and divide by 2
3. That's the minimum load rating per wheel
4. Add margin for passengers, cargo, and towing

Example: Your ute has a rear GAWR of 1,800kg → minimum 900kg per wheel. If you tow or carry heavy loads regularly, aim for 1,000kg+ per wheel.

🔧 Load Rating Calculator — check if your wheels meet your vehicle's requirements

Yes, within limits. Changing rim width while keeping the same diameter is common for performance and aesthetic upgrades.

What you need to consider:

• Tyre compatibility: Wider rims need wider tyres — a 225mm tyre won't work on a 10" rim
• Guard clearance: Wider rims push the tyre outward (unless offset increases to compensate)
• Offset adjustment: Going wider usually means you need a higher ET (more positive offset) to keep the tyre in the same position, or lower ET to push it out
• Weight: Wider rims are heavier — affects fuel economy and acceleration

Safe width change: ±1 inch from factory is usually safe without other modifications. Beyond that, check clearances carefully.

🔧 Tyre Size Calculator — see what tyre widths suit your rim width

Yes — this is called "plus sizing" and it's very common in NZ.

The key rule is to keep your overall tyre diameter (rolling circumference) within ±3% of factory. You go up in rim size and down in tyre profile to compensate.

Example plus-sizing from 16" to 17":

Practical limits in NZ:

• +1 to +2 inches: Almost always fine with correct tyre size
• +3 inches: Usually possible but check clearances carefully
• +4 inches or more: Likely needs guard modifications or LVV certification

🔧 Tyre Size Calculator — compare original vs new sizes, see diameter difference percentage

Plus sizing means fitting larger diameter wheels with lower-profile tyres to maintain the same overall diameter. It's one of the most popular upgrades in NZ.

Benefits:

• Improved cornering response and steering feel
• Better brake clearance for upgraded brake systems
• More aggressive visual appearance
• Wider tyre contact patch for better grip

Trade-offs:

• Harsher ride quality (less sidewall flex to absorb bumps)
• Increased susceptibility to pothole damage (NZ roads are rough!)
• Tyres often cost more in lower-profile sizes
• Heavier wheels reduce acceleration and increase fuel use

The +1/+2 system:

• Plus 1: Go up 1" in rim, go down ~10 in profile (e.g., 205/55R16 → 215/45R17)
• Plus 2: Go up 2" in rim, go down ~20 in profile (e.g., 205/55R16 → 225/35R18)

🔧 Tyre Size Calculator — visualise the size change and check compatibility

These are two completely different measurements that people often confuse:

• Wheel diameter: The size of the metal wheel only (e.g., 17 inches). This is the "R" number in your tyre size.
• Overall tyre diameter: The full height from ground to top of the mounted tyre — includes wheel + both sidewalls. This is what affects your speedometer, clearances, and ride height.

Example: A 17-inch wheel with 215/50R17 tyres has an overall diameter of 648mm (25.5"). A 19-inch wheel with 225/35R19 tyres has an overall diameter of only 640mm (25.2") — smaller overall despite larger wheels.

This is why plus sizing works: you increase the wheel diameter but decrease the tyre profile to keep the overall diameter roughly the same.

🔧 Tyre Size Calculator — compare overall diameters of any two sizes

It depends on how far off they are. Every tyre has an approved rim width range. Slightly outside this range may work but creates issues:

Tyre too narrow for rim:

• Bead doesn't seat properly — air leak risk
• Sidewall stress increases
• This is sometimes called "tyre stretch" — popular in stance culture but not recommended for NZ road use and may fail WOF

Tyre too wide for rim:

• Tyre bulges beyond rim flange protection
• Rim offers no protection from kerb damage
• Reduced steering response

This catches people out. 21-inch wheels exist but aren't as common in NZ (mostly luxury SUVs like Range Rover, Audi Q7, Tesla Model X).

Meanwhile, tyres marked as "R21" in the budget/mid-range segment are often not 21-inch passenger car tyres. They're typically:

• Light truck sizes using inch-based sizing (e.g., 7.50R16 on 16" rims)
• Agricultural or industrial tyres
• Imperial measurement confusion — some sizes that look like "21" actually aren't

If you genuinely have 21-inch wheels (like on a Tesla Model Y Long Range or Range Rover Sport), tyres do exist but are premium-priced and limited in brand choice compared to more common sizes.

🛒 Browse: 21-inch tyres | 20-inch tyres

NZ recommendation: If you're buying a set of wheels for daily driving, alloy wheels are worth the investment for the weight savings and heat dissipation alone. For a spare wheel or work ute, steel is perfectly fine.

Yes, though they're far less common in NZ:

• Forged alloy: Machined from a solid billet of aluminium — much stronger and lighter than cast alloy, but 3-5× the price. Found on high-performance and motorsport vehicles.
• Flow-formed (rotary forged): Cast then spun under pressure while hot. Lighter and stronger than regular cast at a moderate premium. Increasingly popular for aftermarket performance wheels.
• Magnesium alloy: Extremely light but very expensive and reactive (corrodes easily). Rarely seen outside motorsport.
• Carbon fibre: Ultra-light and extremely expensive ($5,000+ per wheel). Used on some supercars like Porsche 911 GT3 RS and Ford Mustang Shelby GT500.
• Multi-piece (2 or 3-piece): Separate barrel, centre, and sometimes lip, bolted together. Allows custom widths and offsets. Popular in car culture but requires careful maintenance (sealing between pieces).

For 99% of NZ drivers, the choice is between steel (budget/utility) and cast alloy (everything else).

Deep dish wheels have a prominent lip (or barrel) that extends well beyond the spoke face, creating a "dish" or concave appearance. The spokes sit recessed behind a wide, visible outer lip.

Key characteristics:

• Wide outer barrel/lip — the defining visual feature
• Usually require very low or negative offset to create the deep lip
• Available in 2-piece and 3-piece construction (allows customisation)
• Popular in car culture, show cars, and some drift builds

NZ considerations:

• The negative offset often pushes tyres past the guards — this fails WOF
• May require guard rolling or flaring (needs LVV certification if significant)
• The exposed lip is vulnerable to kerb damage
• Not ideal for NZ's rough roads and tight parking

Reversible rims (also called dual-offset or flip rims) can be mounted on the hub in two orientations — front-to-back or back-to-front — to give you two different offset positions from the same wheel.

How it works:

• The bolt holes are positioned off-centre so flipping the wheel changes the effective offset
• One way gives a more tucked position; flipped, it pushes the tyre further out
• Common on some steel wheels for 4WDs and utes

Things to check:

• Ensure the valve stem clears the brake calliper in both positions
• Check guard clearance in the "pushed out" position
• Confirm the tyre doesn't contact suspension components in the "tucked" position

These are less common than they used to be, but still found on some older NZ-market steel wheels for Toyota Hilux, Nissan Patrol, and similar vehicles.

Chrome wheels have a mirror-like finish created by electroplating a thin layer of chromium over the alloy (or sometimes over a plastic coating on steel). They were hugely popular in the 2000s and remain a feature on some American-style builds.

Care requirements:

• Wash frequently — brake dust is acidic and eats through chrome quickly
• Never use abrasive cleaners — they scratch the chromium layer permanently
• Avoid automatic car washes — harsh brushes damage the finish
• Use pH-neutral wheel cleaner only — acid-based cleaners strip chrome
• Dry thoroughly — water spots etch into chrome if left to dry naturally
• Apply chrome polish/sealant every few months for protection

These terms are often confused. Here's the difference:

• Hubcap (wheel cover): A decorative cover that clips over the entire face of a steel wheel to hide it. Covers the full diameter. Found on base-model cars. Can pop off over bumps.
• Centre cap: A small decorative cover that sits in the centre of an alloy wheel, covering the hub nut. Usually 50–80mm diameter. Clips or pushes into the wheel centre.
• Wheel trim: Same as hubcap — the NZ/UK term for a full-face wheel cover.

Do they affect anything?

• Hubcaps/covers are purely cosmetic on steel wheels
• Centre caps on alloys are cosmetic and keep dirt out of the hub
• Missing hubcaps/centre caps do not fail WOF
• However, a missing centre cap on a wheel with exposed hub nuts may allow moisture ingress

Yes, with conditions. Wheel spacers push your wheels further outward from the hub. They're used to improve clearance, widen the track, or fit different-offset wheels.

Two types:

• Slip-on spacers (5-10mm): Sit between hub and wheel. Require longer wheel studs to maintain safe thread engagement — at least 1.5× the stud diameter must remain engaged.
• Bolt-on (hub-centric) spacers (15mm+): Have their own studs. The spacer bolts to the hub, then the wheel bolts to the spacer. More secure but adds weight.

• Spacers must not cause tyres to extend past the guards
• Adequate stud engagement must be maintained
• If spacers change the track width by more than 25mm per side, LVV certification may be required
• Quality matters — buy from reputable brands, not cheap imports
• Always re-torque after 50-100km

🔧 WOF Compatibility Checker — verify your setup meets NZ requirements

Technically possible, but strongly discouraged for road use.

Wheel adapters change the bolt pattern — e.g., converting 5×112 (European) to 5×114.3 (Japanese) so you can fit wheels designed for a different vehicle.

Why we don't recommend them:

• Double the failure points: Two sets of studs/bolts that can loosen
• Added weight: Heavy adapters increase unsprung mass
• Offset changes: The adapter thickness pushes the wheel further out
• Quality concerns: Many cheap adapters have poor metallurgy
• Insurance risk: Some insurers may not cover vehicles with PCD adapters

Several options in NZ, depending on budget and requirements:

• Dealer parts department: Guaranteed match but most expensive option ($400-$1,500+ per wheel)
• Wreckers / dismantlers: Good for OEM replacements. Check TradeMe, Pick-A-Part, and local wreckers. Inspect carefully for cracks, bends, and corrosion.
• Aftermarket wheel retailers: Huge range of styles and sizes. Ensure they supply hub-centric rings and correct fitment data.
• TradeMe: Both new and used options. Always confirm PCD, offset, centre bore, and condition before buying.
• Online import: Can be cheaper but check import duty, GST, and that the wheel meets NZ standards.

Our recommendation: Quality aftermarket wheels from reputable brands (with proper certifications) are perfectly safe and often offer better value than OEM. Avoid no-name budget wheels that lack any testing certifications.

Replica wheels copy the visual design of premium brands (BBS, Rays, Enkei, etc.) at a fraction of the cost. Quality varies enormously:

The good:

• Some replicas are well-made and pass safety testing (look for JWL/VIA marks)
• Can provide the aesthetic you want at a realistic budget

The bad:

• Many use inferior alloy composition — more brittle, more prone to cracking
• Poor casting quality → porosity (tiny air bubbles) that weaken the structure
• May fake safety certifications — stamped "JWL" without ever being tested
• Thinner construction to save material → lower load rating than the genuine article
• No meaningful warranty or recall process if defects emerge

These are safety testing standards for alloy wheels. Understanding them helps you identify quality wheels vs cheap counterfeits:

What to look for when buying aftermarket wheels in NZ:

• Minimum: JWL + VIA stamps (both should be present — JWL alone can be faked)
• Better: TÜV certified (common on European brands)
• Red flag: No markings at all, or only "JWL" without "VIA"

No — we sell tyres only, not wheels. Our tyres are shipped unmounted and need to be fitted to your existing wheels (or new wheels you've purchased separately).

Options for fitting:

• Our Te Puke workshop: Fitting & balancing from $25 per tyre
• Your local tyre shop: We ship directly to them if you prefer
• Delivery to your door: Then take your wheels and new tyres to any fitter

🔧 Book fitting online | Get an instant quote (includes fitting option)

It's not legally required in NZ, but strongly recommended.

There is no NZ law requiring you to carry a spare wheel. However:

• Many areas of NZ have no mobile phone coverage — roadside assistance can't reach you
• Rural roads can be hours from the nearest tyre shop
• Tyre puncture repair kits only work on small tread punctures — not sidewall damage, blowouts, or rim damage

Types of spare:

• Full-size matching spare: Best option — swap and drive normally. Heavy and takes space.
• Space saver (skinny spare): Lighter, saves boot space. Limited to 80 km/h and short distances.
• Tyre repair kit: Sealant + compressor. Lightest option but limited in what it can fix.

Yes, it's legal. Many modern vehicles — especially European cars, EVs, and some SUVs — come from the factory without a spare wheel. Instead, they typically include a tyre repair kit (sealant canister + portable compressor).

Vehicles commonly sold without spares in NZ:

• Most BMW, Mercedes-Benz, Audi models
• Tesla Model 3, Model Y, Model X
• Hyundai Ioniq 5/6, Kia EV6
• Many run-flat-equipped vehicles

Can you add a spare? Yes — check if your vehicle has a spare wheel well in the boot. Many do, even if the spare wasn't included. You'll need a wheel that matches your PCD and has adequate clearance in the well.

It depends on the size difference and your vehicle's drivetrain.

Key considerations:

• PCD must match: The space saver must have the same bolt pattern as your vehicle
• Brake clearance: If you've upgraded brakes, the smaller space saver may not clear the callipers — especially on front axle
• Diameter difference: Space savers are already smaller than full-size wheels. If you've plus-sized to 18" or 19", the diameter difference between your full-size tyres and the space saver becomes significant
• AWD vehicles: Large diameter differences between the space saver and your other three wheels can damage the centre differential. Check your vehicle manual — many AWD vehicles specifically warn against extended space saver use

The difference is where the thread lives:

• Lug nuts (studs + nuts): Studs are permanently pressed into the hub. You thread nuts onto the studs. Used by most Japanese, Korean, and American vehicles. Easier to mount wheels — studs act as alignment guides.
• Lug bolts (bolts only): No permanent studs. Bolts thread directly into the hub. Used by most European vehicles (BMW, VW, Audi, Mercedes-Benz). Harder to mount — you must hold the wheel in place while threading the first bolt.

NZ relevance: With our mix of Japanese imports, European vehicles, and Korean cars, NZ has both systems in common use. Make sure any aftermarket wheels, spacers, or replacement hardware match your vehicle's system.

Possibly — and this is critical for safety.

You MUST change nuts/bolts if:

• Your new wheels have a different seat type (conical vs ball vs flat — see Q42)
• The new wheels are thicker or thinner than factory, affecting thread engagement
• You're switching from steel to alloy (or vice versa) and the existing nuts don't sit flush
• Any visible thread damage, cross-threading, or corrosion on existing hardware

Thread engagement rule: At least 1.5× the stud diameter must be engaged. For M12 studs (12mm), that's a minimum of 18mm of thread contact. If your new wheels are thicker, you may need longer studs or shorter nuts.

Always use a calibrated torque wrench — never guess, and never rely on an impact gun alone for final tightening.

Typical torque ranges:

Proper tightening procedure:

1. Thread all nuts/bolts finger-tight first
2. Tighten in a star/cross pattern (opposite corners), not in a circle
3. First pass: torque to half the final spec
4. Second pass: torque to full spec
5. Re-torque after 50–100 km of driving

Re-torquing is essential after every wheel removal and refit. Here's why:

• Metal settles: The contact surfaces between wheel, hub, and nut compress slightly under driving loads, which can reduce clamping force
• Thermal cycling: Braking heats the wheel assembly; cooling contracts it. This can cause slight loosening
• Paint/coating compression: New wheels or freshly painted wheels have coatings that compress under load

When to re-torque:

• After 50–100 km of driving (most manufacturer recommendations)
• After the first instance of hard braking or extended motorway driving
• If you hear any clicking, clunking, or notice vibration after wheel work

Good practice: Keep a torque wrench in your vehicle, especially if you change tyres seasonally or rotate them yourself.

The seat type describes the shape where the lug nut contacts the wheel. Using the wrong type is a serious safety risk — the nut won't clamp properly and can work loose while driving.

How to identify your wheel's seat type: Look at the bolt hole on the wheel face. Conical holes have a tapered/angled surface, ball-seat holes have a rounded recess, and flat-seat holes are… flat.

Locking nuts (also called security lugs) have a unique pattern that requires a matching key socket to remove. They deter wheel theft but come with trade-offs.

Benefits:

• Adds a layer of theft protection — especially valuable if you have desirable alloy wheels
• Typically one locking nut per wheel (the other 3-4 are standard)
• Cost: $30-$80 for a set of 4 locks + key

Downsides:

• Lost keys: If you lose the key, removal requires a specialist tool or may damage the nut. Keep the key in the glovebox or with your spare wheel kit — not at home.
• Tyre shop delays: If you forget to bring the key, the shop can't do your tyres
• Rounded keys: The unique pattern can wear over time, making the key useless

For removal: yes. For final tightening: never.

Impact guns are designed for speed, not precision. Even with adjustable torque settings, they can't reliably deliver consistent, accurate torque to each nut.

What happens when you over-torque with an impact gun:

• Warped brake rotors: Uneven clamping force distorts the rotor surface, causing vibration during braking
• Stretched/snapped studs: Studs are heat-treated for specific torque ranges — exceeding this permanently weakens them
• Stripped threads: Especially on aluminium wheels, which are softer than steel studs
• Cracked wheel mounting surface: Particularly on cast alloy wheels

Correct procedure:

1. Use impact gun to loosen old nuts
2. Hand-thread new nuts to avoid cross-threading
3. Snug with impact gun on lowest setting only
4. Final torque with a calibrated torque wrench in a star pattern

Usually yes — depending on the type and severity of damage.

Finding a wheel repairer in NZ: Search for "alloy wheel repair" in your area. Specialists like CNC Wheels, Alloy Wheel Repair (Auckland), and Smart Repair Systems (Waikato) offer professional services. Always ask if they use X-ray inspection for crack detection on suspect wheels.

Yes — several types of wheel damage will fail WOF inspection.

Will fail WOF:

• Visible cracks in the wheel structure
• Significant buckles/bends visible to the eye
• Missing or broken wheel studs/bolts (even one missing stud)
• Excessive corrosion that has weakened the wheel structure
• Loose or incorrectly fitted wheels
• Damaged bead seat causing air leaks
• Welded repairs that are visibly poor or questionable

Typically won't fail WOF:

• Cosmetic kerb rash/scuffs (surface only, no structural damage)
• Missing hubcaps or centre caps
• Minor paint chips on alloy wheels
• Light surface oxidation that hasn't affected structural integrity

🔧 WOF Tyre Guide — full list of tyre and wheel inspection criteria

Very likely, yes. Speed-specific vibration in the 80–110 km/h range is one of the most common complaints and is almost always wheel/tyre related.

Most common causes (in order of likelihood):

1. Wheel imbalance: Lost balance weight, or wheels not balanced after tyre change. This is the #1 cause. A re-balance ($15-$25 per wheel) usually fixes it.
2. Bent wheel: Runout of more than 0.5mm on the wheel causes vibration that balancing cannot fix. Pothole damage is the usual culprit.
3. Missing/wrong hub-centric rings: Aftermarket wheels without proper rings vibrate because they can't centre precisely on the hub.
4. Flat-spotted tyres: Extended parking (especially in cold weather) can create temporary flat spots that vibrate until the tyre warms up. Permanent flat spots from locked-brake skids require tyre replacement.
5. Worn wheel bearings: Usually accompanied by a grinding or humming sound that changes with speed. Gets worse over time.
6. Warped brake rotors: If the vibration is mostly felt through the brake pedal when braking, rotors are the likely cause — not wheels.

Signs of a bent wheel:

• Vibration at specific speeds (typically 80–120 km/h) that doesn't improve after balancing
• Visible wobble when spinning the wheel (with tyre removed)
• Slow air leak from the tyre bead area
• Uneven tyre wear on one side only
• Steering pull to one side

Professional detection:

• Dial indicator test: Measures radial and lateral runout with precision (0.01mm). Over 0.5mm on alloys or 0.8mm on steels typically needs correction.
• Road-force balancer: Simulates driving loads and can identify bent wheels during balancing
• Visual inspection: Mount on a balancer and spin slowly — look for wobble from the side (lateral runout) and hop from the front (radial runout)

Can it be straightened?

• Steel wheels: Almost always — hydraulic press or roller straightening is effective and affordable ($50–$150)
• Alloy wheels: Often yes for minor bends, using heat and hydraulic presses. More severe bends risk cracking the alloy. Cost: $100–$250 per wheel.
• Forged wheels: More difficult — the harder material resists straightening but is less likely to bend in the first place

These are two different types of structural damage with different implications:

One broken stud is not immediately dangerous for short-distance driving at low speed — but it needs prompt repair.

What to do:

1. Do NOT continue driving at highway speed. The remaining studs are now under increased load.
2. Drive slowly to the nearest workshop (under 60 km/h if possible)
3. Have the broken stud replaced — this typically involves pressing out the old stud from behind the hub and pressing a new one in. Cost: $30–$80 per stud in NZ.
4. Check the other studs — if one broke from over-torquing, others may be weakened

How many studs can I safely drive with?

• 5-bolt wheel with 1 missing: Drive carefully to a shop — not ideal but manageable
• 4-bolt wheel with 1 missing: ⚠️ More risky — 25% of clamping force lost
• Any wheel with 2+ missing studs: ❌ Do not drive. Call a tow truck.

Common causes: Over-torquing (impact guns!), corrosion, cross-threading, or impact damage.

Immediate steps:

1. Pull over safely as soon as you notice the issue (rapid deflation, sudden vibration, or visible crack)
2. Fit your spare wheel if available
3. If no spare: call roadside assistance or a tow truck
4. Do not drive on a cracked wheel — even slowly. The crack can propagate to complete failure

Next steps:

• Small hairline crack: A specialist may be able to TIG weld and stress-test it, but replacement is always safer
• Major crack or structural damage: The wheel must be replaced
• If it's an OEM wheel, check wreckers or your dealer for a matching replacement
• If aftermarket, contact the manufacturer — structural failure may be a warranty claim

What happens when you drive flat:

• First 100 metres: The tyre sidewall is crushed between road and rim. Internal structural cords break. The tyre is usually destroyed within this distance.
• After 500 metres: The rim starts contacting the road surface directly. Alloy wheels gouge and dent; steel wheels bend and deform.
• After 1 km: The rim is likely damaged beyond economical repair. Brake components may also be damaged.

Exceptions:

• Run-flat tyres: Specifically designed for limited driving at reduced speed (typically 80 km/h for up to 80 km) when deflated. The reinforced sidewall supports the vehicle weight.
• Emergency situations: If you're in an unsafe location (motorway, dangerous area at night), driving a very short distance on a flat to reach safety is better than the alternative. Accept the rim will be damaged.

Best practice: Stop as safely and quickly as possible, fit your spare wheel, or call for assistance.

Coastal salt air is particularly harsh on wheels in NZ. With much of the population living within a few kilometres of the coast (Auckland, Tauranga, Wellington, Christchurch), this affects a huge number of vehicles.

What happens:

• Salt accelerates aluminium oxidation — the white powdery corrosion you see on alloys
• Corrosion on the inner rim bead seat creates air leaks between tyre and wheel
• Chrome finishes pit and peel rapidly in salt environments
• Steel wheels rust where paint has chipped

Protection strategies:

1. Wash wheels weekly — use a pH-neutral wheel cleaner, not just water. Pay attention to the inner barrel (use a long-handled brush)
2. Apply ceramic coating or quality wheel sealant — creates a barrier against salt penetration. Reapply every 6-12 months.
3. Address chips immediately — touch up any paint or clear coat damage to prevent corrosion entry points
4. Avoid acid-based wheel cleaners — they strip protective coatings
5. Consider powder-coated wheels — the most durable finish for coastal environments (see Q55)

Diamond-cut (also called CNC-machined or lathe-cut) wheels have a shiny, mirror-like finish on the spoke face created by a computer-controlled lathe that removes a thin layer of alloy. They're standard on many modern vehicles (BMW, Mercedes, Audi, Hyundai, Kia).

How to identify them: Look closely at the spoke face — you'll see very fine concentric lines (like a CD/DVD). The sides of the spokes are usually painted a contrasting colour (typically dark grey or black).

Maintenance challenges:

• The clear lacquer coat protecting the bare alloy is thinner and more vulnerable than paint or powder coat
• Once the lacquer chips or peels, moisture reaches bare alloy and corrosion starts immediately
• Kerb damage is much more visible than on painted wheels
• The wheel can only be re-cut 2-3 times maximum before the spokes become too thin

Care tips:

• Never use acid-based wheel cleaners — they attack the lacquer and the exposed alloy
• Use pH-neutral cleaner and a soft brush only
• Avoid automatic car washes with harsh spinning brushes
• Address any lacquer damage immediately — a spot of clear nail varnish can protect small chips temporarily
• Professional repair involves re-cutting on a lathe ($150–$350 per wheel in NZ)

Powdercoating is the most durable wheel finish available — and it's the best long-term investment for NZ conditions.

Process: Wheels are stripped to bare alloy (chemical or sandblasting), electrostatically coated with powder, then baked in an oven at ~200°C. The heat fuses the powder into a continuous, tough film.

Yes — in dry conditions. But it's more nuanced than "wider = better."

How width affects grip:

• Dry grip: Wider tyres = larger contact patch = more rubber on the road = better dry grip and shorter braking distances. This is why performance cars run wide tyres.
• Wet grip: Wider tyres must disperse more water from under the contact patch. This can actually increase aquaplaning risk at the same speed vs a narrower tyre, unless the tyre has excellent wet tread design.
• Snow/ice: Narrower tyres are generally better — they concentrate weight onto a smaller area, pressing through snow to grip the surface beneath.

Diminishing returns:

• Going from 195mm to 225mm: significant grip improvement
• Going from 225mm to 255mm: moderate improvement, noticeably more road noise and fuel consumption
• Going from 255mm to 285mm: minimal extra grip for daily driving, much heavier steering, significantly worse fuel economy

NZ-specific consideration: Our wet roads and variable conditions mean a moderate width with good wet performance is usually more practical than maximum width. The sweet spot for most NZ cars is the width your manufacturer specified, ±10mm.

Yes — significantly. Low-profile tyres (40 series and below) have less sidewall to absorb impacts, transferring more force directly to the wheel.

What "profile" means: The second number in a tyre size (e.g., 225/40R18). A 40-profile tyre has a sidewall height that's 40% of the width. A 55-profile has a sidewall 55% of the width — much more cushion.

Low-profile risks:

• Pothole damage: NZ roads are notoriously rough. Low-profile tyres transmit pothole impacts directly to the rim, causing bends, cracks, and buckles.
• Kerb damage: Less sidewall protection means the rim lip is closer to kerbs and more vulnerable to scraping.
• Harsh ride: Every bump, crack, and imperfection is felt in the cabin.
• Higher tyre costs: Low-profile tyres are generally more expensive than standard profiles.

Our recommendation:

• 45-series or above for NZ daily driving — good balance of appearance and protection
• 50-55 series for comfort-focused drivers and rural NZ roads
• 35-40 series only if you prioritise appearance and accept the trade-offs (and repair costs)

🛒 Browse: Low-profile tyres | All tyres

We sell tyres only (not wheels), so we ship tyres unmounted. However, if you already have spare wheels, some tyre shops offer a "mount and ship" service.

Your options:

• Standard (our service): We ship tyres to you or your chosen fitter → they mount, balance, and fit to your vehicle. This is the most common and cost-effective approach.
• Ship to fitter directly: Order from us and enter your local tyre shop as the delivery address. When you drop your car off, the tyres are already there waiting. Saves you handling heavy tyres.

🔧 Fitting services | Get a quote (includes delivery options)

Brake clearance is a critical but often overlooked consideration when changing wheels, especially when going to a smaller diameter or a different spoke design.

Risk areas:

• Downsizing from 18" to 17": The smaller wheel may not clear larger brake callipers (especially performance brakes or aftermarket big-brake kits)
• Tight spoke designs: Even at the same diameter, some wheel designs have spokes that sit closer to the calliper than others
• Space saver spares: Often don't clear upgraded brakes

How to check:

1. Measure the calliper: With the wheel off, measure the highest point of the brake calliper from the hub face. Note the width and height.
2. Check the wheel's inner clearance: Many wheel manufacturers publish inner clearance profiles. Compare against your calliper measurements.
3. Test fit: The only 100% reliable method — mount the wheel (without tyre) and spin it slowly to check for contact. Look for a minimum 3mm clearance at all points.

Use this comprehensive checklist before purchasing any wheel:

📞 Contact us with your vehicle and the wheels you're considering — we'll confirm if they'll fit and what you need.

🔧 Tyre Size Calculator — check tyre/rim compatibility