Rim thickness minimum

Moonbiker
Moonbiker Posts: 1,706
edited December 2015 in Workshop
How thin do you go before replacing?

Was bored so just checked mine they are ma-2 rim @ 1.1mm thickness

$_35.JPG?set_id=880000500F

Theese rims are 1.5mm thick new according to Jobst Brandt

http://yarchive.net/bike/rim_wear.html

Seems various idea about minimum of what is safe from 1mm to 0.7mm



Thinking i will replace if the get below 1.0mm

Comments

  • wishitwasallflat
    wishitwasallflat Posts: 2,927
    Do a search the consensus is you should replace rims when they reach 1mm or <1mm and 0.7mm is seriously dangerous.
  • jermas
    jermas Posts: 484
    The rim wall is usually thinner (due to uneven brake wear) below the area that can be measured with a caliper (ie in the boxed section) -so 1mm is about right.
  • Bobbinogs
    Bobbinogs Posts: 4,841
    Yeah, I think it bears to be cautious. A club friend had a spectacular blow out on a ride a few weeks ago which resulted in the dreaded call to a friend. Could have been a lot, lot worse.

    Those sprung callipers are good but, as stated, it can be a bit tricky to get an accurate reading across the whole rim surface. Have a look at the wear though, see if you can feel the shallowest point with your thumb and then get a reading there. Anything less than a mm and it is time to get the wallet out...anything near to 0.7 and it is time to stop riding it!
  • keezx
    keezx Posts: 1,322
    I don't even bother measuring.
    Pump 1 bar or 15 PSI more then normal and you'll find out if a rim/tyre combination is fit for purpose.

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