|Chain Stretch - How much is too much?||B2|
Aug 29, 2002 3:47 PM
|I just measured my chain. I get about 12-1/32". My understanding is that 12" even is what a new chain is. So is 1/32" too much??
Aug 29, 2002 5:34 PM
|For high performance systems (9/10 speed) the standard rule is replace the chain when you get to 0.5% elongation. This equals 1/16" per 12". On older systems (7 speed) you can get away with 1/8" per 12". Some people replace chains sooner, thinking they can save their cassettes. My math says that this is not productive, given the costs of chains and cassettes.|
Aug 29, 2002 5:58 PM
|My main concern was the premature wear on the cassette. I'm running Campy 10 speed and a Wipperman chain. I now have a little more than 1,000 miles on the chain and thought I'd better check based on others comments regarding the Wipperman chain. I'll continue to monitor.
|another way to check; same results||cory|
Aug 30, 2002 7:28 AM
|Grant Petersen at Rivendell says to put the chain on the big ring and pick it up twixt thumb and forefinger at 3 o'clock (as you face the chainring, not a.m.). If you can pull enough slack to expose a tooth, it's time to replace.|
|go to your shop...||seyboro|
Aug 30, 2002 5:49 PM
|...or you just get the chainwearmeasuringthingamajiggie from Park Tool yourself. Absolutely idiot proof (...and you can charge all your buddies a dollar for checking theirs, money back in no time!!)|| |