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  1. #1
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    XTR 985 FD on 44t big ring?

    Has anyone tried using the XTR 985 FD on a conventional 22-32-44 crank? Officially the new FD lists a maximum 42T, but I'm wondering whether it really is limited or whether it just reflects the largest ring Shimano happens to put on a Dynasys crank.

  2. #2
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    Reputation: rockyuphill's Avatar
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    The 985 works fine up to a 44T, it's the 980 that maxes out at 42T. Max chainline might be an issue on the 985.

    Model Number FD-M985
    Series XTR
    Swing Action Top Swing
    Cassette Compatibility 10-speed
    Maximum Capacity 14T
    Top-middle Minimum Capacity -
    Top Gear Teeth 38-44T
    Cable Routing Dual Pull
    Chain Line 38T: 46.8mm 40-44T: 48.8mm
    Chain Stay Angle 66-69
    Multi-Clamp (28.6/31.8/34.9mm) Yes
    Seat Tube Band Mount 28.6/31.8/34.9mm


    Model Number FD-M980
    Series XTR
    Swing Action Top Swing
    Cassette Compatibility 10-speed
    Maximum Capacity 18T
    Top-middle Minimum Capacity 10T
    Top Gear Teeth 42T
    Cable Routing Dual Pull
    Chain Line 50mm
    Chain Stay Angle 66-69
    Multi-Clamp (28.6/31.8/34.9mm) Yes
    Seat Tube Band Mount 28.6/31.8/34.9mm
    I'm a member of NSMBA and IMBA Canada

  3. #3
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    Thank you very much for the input. Apparently the 985 is meant for double cranks as opposed to triples, which would explain the chainline. I'd still love to hear if anybody has actually tried the 980 on a triple with a 44t.

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