Relatively new to road cycling, have bought a 2nd hand bike and am thinking some parts of the drivetrain need replacing. Have tried to find this online and can't find any answers. Thanks!

  • 1
    Generally speaking, a cassette will last two or three chains, and a set of chainrings will last two or three cassettes. But, of course, if chain replacement is neglected then both cassette and chainrings wear faster. Dec 5 '16 at 22:04
  • Welcome to Bicycles @Ashley. We generally advise new members to take the tour to make best use of the site. Of course, yours is a common question; while the linked question doesn't look the same, we think the answers will help you.
    – andy256
    Dec 5 '16 at 23:16

If the new cassette has the same gears (# teeth) as the old one, you may not need to. If your chain is worn or in bad shape, this would be the time to replace it. If the new cassette has a different number of teeth in the larger cogs, you may need to lengthen or shorten the chain.

  • Welcome to Bicycles! Thanks for answering one of our questions, hopefully you'll answer more. To help you with that, we recommend that new members take the tour, also check out How to Answer. Good to see you here
    – andy256
    Dec 5 '16 at 23:21

Not the answer you're looking for? Browse other questions tagged or ask your own question.