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Old 06-24-19, 12:10 PM
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fietsbob 
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I buy Tacx pulleys they're nylon.. and quieter I have them on
chain tensioners.. & friction shifted derailleurs

BITD pulleys were just round , because chain side plates were bigger than chain rollers..

now for faster shifting the chain's side plates are same width as the rollers , so your pulleys need teeth

at least the top one.






....

Last edited by fietsbob; 06-25-19 at 08:14 AM.
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