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Thread: Trek 7.5FX Disc

  1. #1
    RoadBikeReview Member
    Join Date
    Oct 2008

    Trek 7.5FX Disc

    Hi there,

    I'm new here, and I have a question about Groupsets.

    I have a fairly standard Trek 7.5FX Disc which I took down the Pacific Coast Highway this summer, from San Francisco to Los Angeles.

    Having done that, I feel I need a greater spread of gears to what came as standard.

    Deore Shifters
    Deore Crank & Chainrings (48/36/26)
    Deore FD
    SRAM Cassette (11-26)
    Tiagra RD

    Proposed Upgrade:
    XTR Shifters
    105 Bottom Bracket
    105 Crank (175mm) with Shimano PD-M540 pedals.
    105 Triple (52/42/30)
    105 FD
    SRAM 9 Speed Cassette (11-34)
    105 RD

    My question is whether the XTR shifters will work with the 105 Chainrings & Derailleurs. And whether the derailleurs will work with the SRAM Cassette.

    Many thanks.

    Last edited by anthonyedgreen; 10-28-2008 at 09:21 AM.

  2. #2
    Reputation: Puchnuts's Avatar
    Join Date
    Oct 2008
    I've been "revising" my Trek FX 7.5 - but not to extend the range of gears - stock is fine where I live/bike. But that is a nice bike and deserves better than what came with it - IMHO. So I...

    Shimano Ultegra GS RD

    Shimano XTR FD

    SRAM Attack shifters - 9 Spd.

    SRAM PG-970 "PowerGlide II" 12 - 26 9Spd. cassette

    SRAM PC951 chain

    MKS Campy-clone pedals, MKS toe-clips etc.

    Panaracer Pasela TourGuard 700 x 28C tires

    Avid SD-7 brakes (throw out those Avid SD-3's - weak and impossible to keep adjusted)

    Kool Stop Thinline pads

    Terry Fly saddle

    Serfas grips

    Next: Building wheels (Bontrager wheels makes me want to hurl) - Mavic A719 32h rims, Ultegra hubs, 14/15 DB spokes.

    Then, I believe, this bike will be at it's fullest potential for what it could be.

    Good luck!

  3. #3
    RoadBikeReview Member
    Join Date
    Oct 2008
    I've decided to go with

    Shimano 105 Chainset 52/42/ and keep the 26 granny
    12-27 Cassette

    I have the stock Avid BB-5 disc brakes, I may change them to V brakes on a carbon fork next summer

    700-28 tyres

  4. #4
    RoadBikeReview Member
    Join Date
    Sep 2008
    that will be an awesome bike with the 105/xtr matchup, a really nice light set of wheels with the carbon fork will make it super light too

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