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  1. #1
    mtbr member
    Join Date
    Dec 2014

    Looking for Oval Chainring Solution for Specialized Epic 29er

    I purchased a pair of "oval" chainrings from Rotor for my 2013 Specialized Epic Marathon 29er (all SRAM XO components).

    Problem is, although the larger (34t) chainring mounts correctly, it's too large for the front derailleur, so I either have to go back to the original large ring, or remove the larger chainring and derailleur entirely, and switch to the smaller (24t) chainring only.

    That presents a new problem - the Rotor oval chainring isn't designed to be a "sole" chainring on a mountain bike because it doesn't have he "narrow/wide" tooth configuration.

    Anyone know of a 24t "oval" chainring with the narrow/wide alternating teeth that would fit an SRAM crankset?

  2. #2
    mtbr member
    Join Date
    Nov 2007
    There should be some adjustability in the front derailleur... maybe a 'chip' that can be flipped to move the derailleur up or something. 34t is not that big, so it should easily adjust to run it. Post a close up of the derailleur if you can, might help to identify a solution.

  3. #3
    mtbr member
    Reputation: RS VR6's Avatar
    Join Date
    Mar 2007
    I think the smallest available is a 26T from Doval. It mounts to the 64bcd position of your double chainring spider.

    Doval Chainring MTB BCD64 26T 16 NW Micro OCP | eBay
    Cervelo S2
    Specialized Carve Pro
    Pivot Mach 5

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