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How often should a chain be replaced?(4 posts)

How often should a chain be replaced?J-Dub
Apr 24, 2003 7:03 PM
Thanks for your interest. A friend recently purchased a new road bike and was told to replace the chain every 1500 to 2000 miles. At that rate I'd go through about 5 or 6 chains a season. Seems a little excessive to me, but you learn something new every day. Thanks again. J-Dub
re: How often should a chain be replaced?wielerpret
Apr 25, 2003 12:57 AM
Clean and lubricate it regularly; don't allow it to rust after a ride in the rain, and you'll easily enjoy it for plm. 7000 kms. (My Campy powerlink broke after 5000 kms, but after repair the chain was fine again). Above 7000 it is likely to wear the cassette and you'll need to replace both at 10.000 kms or so. So, the 7000 kms limit doesn't wear out the chain completely , but allows longer use of the cassette. Good luck. Luke. Amsterdam.
when it's worn...C-40
Apr 25, 2003 5:03 AM
Mileage means nothing when it comes to chain wear. Some folks get 4 times the wear of others depending on the method of maintenance and riding conditions.

Either get a Park chain checker or a 12 inch long machinists scale to measure the increase in length. When the chain length has increased .5% or 1/16 inch over 12 inches, it's time to change.

A new chain will measure exactly 12 inches center to center or edge to edge over the span of 24 pins. Placing the scale on the edge of a pin, the pin on the opposite end of the scale will be completely covered. As the chain wears, the covered pin will begin to peak out from the under the scale. When the amount of pin showing approaches 1/2 the diameter of the pin, the chain has lengthened .07 inch or a little more that .5% worn. Change before reaching that amount of wear.

Personally, I can get 4000 miles from chain and never get close to .5% wear. I usually find that side wear deteriorates shifting before the chain is worn .5% and change it just to improve shifting.
re: How often should a chain be replaced?toronto-rider
Apr 25, 2003 7:32 AM
I had to replace my chain and cassette afte 1500km, I could not believe it. The only reason I have is that I had been using my bike on a stationary trainer, which puts way more stress on the parts than I had been ridding on the road.