Just a question. I was looking around at 9 speed chains for when I go to replace mine. I was specifically looking at the SRAM pc 951 and 971. Going by numbers, the 971 is a little bit higher end. But, they are IDENTICAL and the 951 is lighter by 1 gram. Why do they have 2 chains that are the same, but have different numbers. Look.
What makes the $7 price difference?
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