I just replaced my rear derailer. Deore LX M570 with a Deore LX M580. LBS said it was the same derailer, just a longer cage. Also am replacing the chain. How many more links should I add to compensate for the extra cage length? Is there a website that has pictures of what the derailer should look like on a certain gear/chainring combination. Or is there some rule of thumb?
Thanks in advance.
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Thread: Chain Length
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