Originally Posted by
OH~Treker
I bought a Park chain checker to see if my 1998 Trek 720 chain needed replacement. It isn't showing any signs of wear. When I checked it at the .75 measurement it came out like a new chain( I do good maintenance). When I checked my 2009 Trek 820's chain it was way past the scale and it(the checker) completely sunk in. According to the instructions, that chain is shot. I know that can't be. What gives? Thanks in advance
How old are the chains, how much use, what kind of use. The make and model of the bikes, and even the year of the bikes is irrelevant. The chain can wear out quickly or slowly depending on usage. The ruler method is the "definitive" method of checking chain wear, but I don't know if the chain-checker gives false positives or false negatives. It will be interesting to see how your measurement compares to the chain checker.