Said It Here

How to tell if used car tires are worn out

Used car tires can be difficult to evaluate if you aren't sure what to look for or where the tread wear indicators are located. Without a clear way to judge tread depth, buyers risk missing safety issues and paying for unexpected replacements shortly after purchase.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Asking for community opinions on photos, using the penny test, and checking manufacturing date codes or for tire rot.
  2. 2
    Inspecting the tire closely for unusual rubber bits or looking up model-specific tire diagrams.

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/AskMechanics1 person · September 2026

“I wanted to get an opinion on the tire treads (if they seem worn or not). I’m not the best at judging them so was hoping to get some opinions.”source ↗

Bulky_Giraffe2181 · r/AskMechanics · 2 upvotes
r/MechanicAdvice1 person · September 2026

“Rear tyre on my Honda shadow 750 2009, I can’t find any wear indicators apart from this very thin bit of rubber that is inline with my tyre so not if it needs changing.”source ↗

Immediate-Cycle3763 · r/MechanicAdvice

Where this came up

People with this problem also raised