Wheel brake surface

AndyD2574 Posts: 1,034
edited April 2012 in Workshop
How do you tell if a wheel is worn?
There are still grooves on the braking surface but a straight edge shows that there is a very slight concave (1mm) to teh surface.

Is this a problem?
Specialized S Works Venge
Argon18 E114
Specialized Langster Single Speed
Scott Spark Expert 29'er
GT Avalanche


  • sungod
    sungod Posts: 16,878
    some have wear indicators, like a dimple, when it's no longer visible it's time for a new rim

    but unless they were very thick rims to start with, 1mm is deep!

    if your's are worn concave that much i'd say don't ride them, the tyre could blow off or the rim could fracture

    pics here... http://pardo.net/bike/pic/fail-026/000.html
    my bike - faster than god's and twice as shiny
  • ugo.santalucia
    ugo.santalucia Posts: 28,301
    Is your 1 mm measured or estimated? If it's 1 real mm it's time for a re-rim, if at all possible on your wheels, if it's only half a mm, then keep riding
    left the forum March 2023