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  1. #1
    Senior Member KLW2's Avatar
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    Oct 2005
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    White Bear Lake Mn
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    88 Schwin Voyageur, 84 Schwinn World Sport, 85 Univega Alpina Uno, 85 Fuji Espree, 09 Novara Strada, 06 Jamis Durango, 03 Specialized Expediton Sport, 09 Surly LHT, 12 Novara Gotham
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    How to size for a front disc conversion?

    I have a bike with a front shock and want to convert from V to disc. Does the shock disc mount have anything to do with the size disc system I get? I know I will have to buy a new front wheel with the correct hub but beyond that I am not sure how to proceed.
    Thanks,
    Keith

  2. #2
    Rat Bastard mcoomer's Avatar
    Join Date
    Jul 2006
    Location
    Sammamish, WA
    My Bikes
    Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
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    If your fork is disc compatible there will be two mounts at the bottom on the left stanchion. You will need to get a caliper mount for the type of brake that you want to use (Avid, Hayes, Magura, Formula, etc) to match the size of the rotor that you want to use up front (160mm, 185mm, 205mm). After that just pick up a wheelset with either the Shimano centerlock or ISO rotor mount and you're set for some real stopping power. Personally, I run a 185mm on the front and a 160mm on the rear.

    Mike
    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
    '08 Specialized S-Works Stumpjumper
    '09 Specialized S-Works Tarmac SL2

  3. #3
    Small Member maddmaxx's Avatar
    Join Date
    Nov 2003
    My Bikes
    Leader home built hardtail, Diamondback Response
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    The brake caliper is generally the same for all rotor sizes. The adaptor used to mount the caliper to the fork is size specific as it spaces the caliper the proper distance from the axle centerline. This way, you can move the brake system from application to application with only a change in adapter. (and the rotor too)

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