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When do I replace my chain...and what should I put on?(6 posts)

When do I replace my chain...and what should I put on?rodey
Apr 1, 2003 2:43 PM
I have about 600 miles on my chain and have been told varying things regarding replacing them...so...when do you guys/girls replace your chains? I have been told everything from 500 miles, 1000 miles, 3000 miles, 1 a year and 'take it to a bike store and have them measure it'.

Also, there are a few manufacturers for chains, which should I get/stay away from...I have a Dura Ace Triple and want to avoid running the same chain on it too long...

Thanks!
there is a tool from park that works great!the bull
Apr 1, 2003 3:31 PM
part# par-sa-cc2 It measures th stretch.
as far as what you should put on?
I use original equipment!
change at .5% stretch...C-40
Apr 1, 2003 5:19 PM
Some folks will run a chain up to 1% stretch, but chains like the campy 10 are recommended to be changed at .5% stretch.

.5% is 1/16 inch over 12 inches. The newest version of the park chain tool has markings that indicate .5% and 1% stretch.

Personally, I use a 12 inch machinist's scale to measure the length. If you lay the chain on a bench and stetch it tightly, the scale should be placed with one end on the edge of a pin. The opposite end of the scale will completely cover the pin at that end (when the chain is new). When the pin at that end peaks out from the scale by 1/2 the diamter, the stretch is slightly more than 1/16 inch, since the pin is about .140 inch diameter.

The term "stretch" is also a misnomer. The chain does not actually stretch. The chain becomes longer due to wear on the pins and the bushings that the pins ride against.
Stick with D/A chains at this point...merckx56
Apr 2, 2003 7:04 AM
I change my D/A chains every 1500-2000 miles, depending on what the conditions I've been riding in have been.
Do you measure the chain to tell ?Maartin
Apr 2, 2003 9:07 AM
or from expierance find it best to change ?
nope...merckx56
Apr 2, 2003 10:11 AM
I used to measure chains, but there are so many variables that can contribute to chain wear. I get about 1000-1500 miles out of a chain on the cross bike, simply because it's ridden in all weather thru all kinds of crap. The race bike goes the 1500-200o mile route because it only comes out when the weather is fair. Changing the chain more often prevents having to buy new cassettes. I haven't bought a new cassette in two years. You must remember too, that how much torque that is place on the chain is a contributor to it's wear. People who are recreational riders or lightweights can probably get more miles from a chain than 180 pound sprinters.