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  • 38t x 12-32 gear configuration help!

     tomlevell updated 11 years, 6 months ago 3 Members · 4 Posts
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  • thomasraelburke

    21 January 2009 at 3:48 pm

    im setting up a ss 38t cog up front with a 12-32 cassette in back, 8 speed.

    what size rear derailleur do i need, im guessing 8 speed but what size cage is best etc. also what size chain for this setup. im hoping i dont need a chain guide cos they cost a bomb! but if i do any cheap good ones that could be recomended would be class. cheers folks

  • Steve Kish

    21 January 2009 at 9:25 pm

    My XT short cage says ‘Max 28T’, so I recon a long cage one.

    I use a 105 on my road bike with 38T inner ring but that’s with an 11-26 cassette.

    I have seen a few medium cage ones on the Bay of Eee, but they all seem to be arse-about-face Rapid Rise ones. 😥

    Shouldn’t need a chain guide with a single ring unless you’re using a bracket axle far too long. However, in the unlikely event that you do, a front mech without a cable may be a good option – just tweak this into position with the adjustment screws.

    About 98% of Shimano rear mechs are interchangeable and not dependant on 7/8/9 speed cassettes, so that bit’s easy.

    Any 7/8 speed chain should fit.

  • thomasraelburke

    24 January 2009 at 5:58 pm


  • tomlevell

    24 January 2009 at 6:18 pm

    A short cage should work as it’s assuming your running a triple ring set up which makes the change in cogs at the back far larger.

    And yeah a front mech fixed in position should do the job.

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