Why Your Tyres Are Wearing on the Inside Edge

Inside-edge tyre wear is one of the clearest warning signs a car sends. When the inner shoulder of a tyre is scrubbed smooth while the rest of the tread still looks healthy, the tyre isn’t sitting flat on the road — and that costs you grip, money and, eventually, a roadworthy pass. This guide explains what causes inner-edge wear on Australian cars, how to tell alignment from suspension, and what a fix should cost.

What does inside-edge tyre wear look like?

Run your hand across the tread from the outer shoulder to the inner shoulder (the edge closest to the centre of the car). Inside-edge wear shows as a band of low or bald tread on the inner shoulder, often with the steel belts or wear indicators showing there first while the outer two-thirds of the tread still has plenty of depth. It’s common on the front tyres of front-wheel-drive cars and on the rear of many independent-rear-suspension sedans and SUVs.

What causes tyres to wear on the inside edge?

The tyre wears wherever the load is concentrated. If the tyre is tilted in at the top, or the wheels are steering slightly against each other, the inner shoulder carries more than its share and wears fast. The main culprits:

Cause	What’s happening	Typical fix
Excess negative camber	Top of the wheel tilts inward, so the inner shoulder takes the load	Wheel alignment; camber bolts/arms if adjustable
Toe-out	Wheels point slightly away from each other, scrubbing the inner edges	Wheel alignment (toe reset)
Worn suspension bushes / ball joints / tie-rod ends	Alignment drifts as worn parts let the geometry move under load	Replace worn parts, then align
Lowered or modified suspension	Lowering springs often add negative camber not corrected at fitment	Adjustable arms + alignment
Chronic underinflation (both inner + outer shoulders)	Low pressure lets both shoulders dig in — check pressure first	Set to placard pressure, cold

As Yokohama Australia puts it, “excessive camber causes premature outer or inner shoulder wear,” while excessive toe “results in feathered edges and increases fuel consumption.” That’s the core of it: single-edge wear points to camber and toe, not pressure.

Is it alignment or is it pressure?

This is the quickest thing to rule out at home. Underinflation wears both shoulders roughly evenly (see what happens if you underinflate your tyres). Wear that’s only on the inner edge — and only on one or two wheels — is a geometry problem, not air. Set your tyres to the placard pressure cold and re-check; Bridgestone Australia notes most passenger cars sit between 30–36 psi and that you should always follow the placard, never the sidewall maximum. If the inner-edge pattern is there with correct pressure, book an alignment.

How do I know if it’s worn suspension rather than just alignment?

An alignment shop will measure camber and toe, but if worn bushes or ball joints are letting the geometry move, a fresh alignment won’t hold. Signs of worn suspension include clunks over bumps, uneven wear that returns soon after an alignment, and play felt when the wheel is rocked at 12 and 6 o’clock (hoisted). Ask the shop to inspect control-arm bushes, ball joints and tie-rod ends before they set the angles — aligning a car with worn parts is money wasted.

Can I keep driving on inside-edge wear?

Only briefly, and only if there’s still legal tread across the whole tyre. Australia’s legal minimum is 1.5mm in all principal grooves — if the inner edge is below that, the tyre is illegal and will fail a roadworthy/pink-slip/safety inspection even if the rest looks fine (see the 1.5mm rule and how to find your wear indicators). Inner-edge wear also strips grip where you need it in the wet, so treat it as urgent.

What does it cost to fix?

A wheel alignment in Australia typically runs about $60–$120 as a guide in 2026, more for a four-wheel alignment or an adjustable aftermarket setup — confirm with your local shop. Suspension parts add to that. The bigger cost is the tyres: catching inner-edge wear early can save a set. If the tyre is already worn past the belts on the inside, it needs replacing regardless of the alignment.

How do I stop it coming back?

Get a wheel alignment after any kerb strike, pothole, suspension work or new tyres, and roughly every 10,000km as Yokohama Australia suggests. Rotate your tyres on schedule so no single corner does all the wearing, keep pressures at placard, and have suspension checked at each service. If you’ve lowered the car, budget for adjustable camber arms so the geometry can actually be set correctly.

Bottom line: Inside-edge wear is your car telling you the wheel isn’t sitting flat — usually negative camber or toe-out, sometimes worn suspension, occasionally underinflation on both shoulders. Check pressure first, then get an alignment with a suspension inspection, and fix it before it eats another tyre.

Frequently asked questions

Why is only my inside edge wearing and not the outside?

Because the wheel is tilted in (negative camber) or toeing out, so the inner shoulder carries the load. Even, both-shoulder wear would point to low pressure instead.

Can underinflation cause inside-edge wear?

Low pressure normally wears both shoulders together. If only the inner edge is going, it’s almost certainly alignment or worn suspension, not air — but always confirm pressure first.

Will an alignment fix inside-edge wear?

An alignment stops further wear if the geometry is the cause and the suspension is sound. It can’t restore tread that’s already gone, and it won’t hold if bushes or ball joints are worn.

Is a tyre worn on the inside edge illegal in Australia?

Yes, if any principal groove is below 1.5mm — including the inner edge. It will fail a state inspection even if the rest of the tread is fine.

How much does it cost to fix inside-edge wear?

A wheel alignment is roughly $60–$120 as a guide in 2026; worn suspension parts and any replacement tyres cost extra. Confirm current pricing with your local fitter.

External references: Yokohama Australia — Wheel Alignment and Bridgestone Australia — Tyre Pressure Guide.

Figures and rules change — confirm tread limits with your state road authority and pricing with your tyre fitter.