• Updating the beater with some new old parts.

    Q: I have a Shimano 600 hub with a 7-speed Shimano cassette on, the one where the small ring is the lock ring. Will the same hub also accept a 6 speed cassette? Will I need a spacer? Will it fit 8, or is that for 130mm-spaced frames?

    Also, if I'm replacing the cassette, chain, and chainrings, should I also replace the rear mech's jockey wheels?

  • Will the same hub also accept a 6 speed cassette? Will I need a spacer? Will it fit 8, or is that for 130mm-spaced frames?

    Also, if I'm replacing the cassette, chain, and chainrings, should I also replace the rear mech's jockey wheels?

    6-speed Uniglide cassette will fit, 8-speed won't. No extra spacers required, the 7-speed was a narrower spacing to fit 7 sprockets in the space previously occupied by 6.

    You don't need to replace jockey wheels unless they are severely shagged out, somewhat worn jockey wheels won't have a negative impact on the new chain in the way that worn sprockets and chainrings will.

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