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  1. #1
    mtbr member
    Join Date
    Oct 2004

    Chainring difference

    I've been going through the Shimano and Sram documents trying to find an answer but to no avail. Hopefully someone can enlighten me. If I were to run an e.13 DRS what is the maximum difference that I can run between the no. of teeth of the inner and middle ring whilst maintaining a clean shift. The Shimano technical docs give you a "Min. difference between top and intermediate" and also "Front chainwheel tooth difference" but neither is what I want. I would guess about 12 teeth.

  2. #2
    MTJ is offline
    mtbr member
    Join Date
    Feb 2004

    A little confused

    I'm trying to figure out why this post hasn't been picked up in the last 2 days and I'm beginning to think that I'm not alone. I have no idea what "an e.13 DRS " is, and I'm thinking that other people on this board don't either.

    Typically a mtb derailleur gives you about 12 teeth to play with and a road derailleur gives you about 14 teeth (39/53 is a standard road double).

    Can you give us some more info, or did this answer your question?

  3. #3
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
    Join Date
    Dec 1998
    I have run 46/28 straight cut rings and had it shift like throwing a light switch. YMMV especially if you have never used non-indexed shifters.
    The trouble with common sense is it is no longer common

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