Why did one of the pulleys on my derailleur wear down ? Can I just reverse them ? Which pulley is 'more import?
Which one is more important ?? Sram rr. der. on 12 y.o. bicycle. thanks.

Which one is more important ?? Sram rr. der. on 12 y.o. bicycle. thanks.
When placing the pulley as a part of water pump replacement, make sure it's centered and tight. Learn about placing the pulley when replacing ...
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How does a pulley work
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Supercharger Pulleys
Our interchangeable upper supercharger pulleys are the best looking, best performing pulleys on the market! ... It is very important to get the pulley lined up correctly. ...