Symptoms
- Small raised bars visible across the tread grooves
- Bars are level with the tread blocks around them
- Reduced traction, especially in rain
Likely causes
- CommonTire has reached the end of its usable tread lifeWear bars are built in at about 2/32 inch to signal it's time to replace.
What to do
- Confirm the wear bars are flush with the tread by running a finger across the area.
- Check all four tires, since they may not all be at the same point.
- Plan to replace the tire soon rather than waiting for it to go completely bald.
- Consider replacing tires in pairs (same axle) or as a full set for even handling, depending on how the other tires look.
- Avoid heavy rain or highway driving on a tire at this stage if replacement isn't immediate.
Tools and parts
- Tread depth gauge (optional)
Replacement tiresSearch: “tire size for [your car model]”
When to call a pro
Schedule tire replacement soon; driving for long on tires at this wear point increases risk of hydroplaning and blowouts.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.