When to replace chain and/or cassette?

Triathlon Forum
1

Mechanic at the LBS put the fear of god in me about timely replacement of my chain. Although it has over 5,500 miles on it, when I use the park tool to measure it, the 50% side slips in easily but the 75% side does not. When I use a ruler to measure, I get 12 complete links measuring 12 1/16". Do I need to replace it? FWIW, I’m a light rider, only ride in the rain when caught in it (1 or 2 times a year), and lube the chain after nearly every ride.

And how will I know when it’s time to change the cassette? Right now it seems to shift fine. Thanks.

2

http://sheldonbrown.com/chains.html

Replace it. 1/16" should not have worn the cassette, but you will find fairly quickly once you put the new chain on it.

3

Personally I’m horrible about keeping track of mileage on various parts. I’ve gotten into the habit of replacing the chain and cables (brake and shifter) each spring.

4

thanks
.