If you notice grease on the inner edge of your tyres, it often points to a damaged CV boot or leaking wheel bearing grease. Both issues can lead to further wear, noise, and even failure of suspension or drivetrain components. An inspection is needed to confirm the source of the grease and prevent more costly repairs.

What does it mean if there is grease on the inner edge of tyres?

Grease on the tyre surface usually indicates that a protective boot or seal has failed, allowing lubricant to escape. This is most commonly linked to CV joints, axle boots, or wheel bearings.

Common causes of grease on the inner edge of tyres

• Torn or leaking CV boot
• Failing CV joint throwing grease outward
• Leaking wheel bearing grease
• Damaged axle seals
• Suspension joint or ball joint grease leakage

Why do you need to fix this problem quickly?

Grease leakage means the component is losing lubrication, which leads to rapid wear and eventual failure. If left unchecked, this can cause vibration, clunking noises, loss of steering control, or even axle breakage.

How do you know when to get it checked?

You should book an inspection if:

• You see grease splattered on the inner wheel or tyre
• You hear clicking or popping noises when turning
• You notice vibrations or knocking from the suspension
• The vehicle pulls or feels unstable when driving
• You detect unusual tyre wear alongside the grease

What happens during an assessment?

A mechanic will:

1. Inspect CV boots, joints, and axles for tears or leaks
2. Check wheel bearings and seals for grease leakage
3. Inspect suspension ball joints and tie rods for damage
4. Clean the affected area to trace the source of grease
5. Recommend repair or replacement of the faulty part

How much does it cost to fix?

CV boot replacement typically costs $250–$500. Full CV joint or axle replacement may cost $500–$1,200+. Wheel bearing repairs generally range from $400–$900.

Is it unsafe to drive with grease on tyres?

Yes. Grease on tyres means a protective seal has failed, which can lead to component failure while driving. It also reduces tyre grip and braking performance. The issue should be inspected and repaired promptly.