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  1. #1
    Senior Member
    Join Date
    Oct 2010
    Pipe Creek & Houston, Texas
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    Twisting Shifter Grip Conversion/Larger Big Ring

    I'm modifying a Gary Fisher Marlin GS for road duty. I replaced the flat bar with a Jones H-bar, this is ideal for my GF's preferred narrow hand placement, but requires shuffling the current Alivio trigger shifters way outboard due to limited grip end space (5.5 inches). I'm guessing a twisting shifter would be more convenient and solve some of the ergo issues we both have with those Alivio shifters, even when they are in the correct location. The drive train is an 8 speed triple, Deore RD, Alivio FD; is an 8 speed twisting grip shifter a direct and compatible conversion from trigger shifters? Any recommendations?

    Another issue is the high gear. The current Bontrager crankset has a 42 tooth big ring (104BCD/4bolt), I would like to install a 48 tooth Shimano outside ring; any comments on that swap? BTW, I measured and there is clearance for the larger ring from the chainstay, FD is top pull clamp on, so room here also.

  2. #2
    Senior Member commo_soulja's Avatar
    Join Date
    Aug 2008
    My Bikes
    are fun to ride
    1 Post(s)
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    You'll have to get a Sram Attack grip shifter if you want to use your Shimano derailleur. The X.# series shifters are only compatible with Sram rear derailleurs. All Sram front grip shifters are Sram/Shimano compatible. You may have to raise the front derailleur to clear the larger 48t ring. .
    Mythical Creatures Touched Me in my Bathing Suit Area.

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