• 06-17-2016
    ghabe
    12 Attachment(s)
    Specialized Grom Hit FSR build
    I picked up a used 2008 Specialized Grom Hit FSR for my 7 years old son last fall. Although it was in excellent condition, there were a few issues with the bike:


    • The color! My son wasn't a big fan of purple!
    • The weight, which was a little over 33.5 pounds.
    • The gearing. The Grom Hit is designed for DH and had a 34t chainring and 11-32t cassette.


    So the goal with this build was to make the bike a bit more versatile, by reducing the weight and improving the gearing for a 7 years old. Here's the bike when I picked it up:

    Attachment 1077009

    I took it apart entirely and got it powder coated flat black:

    Attachment 1077010

    Attachment 1077011

    Reassembled the frame, with all new bearings. The old one were actually still in great shape, but I damaged a few when removing them prior to sending the frame for powder coating:

    Attachment 1077012

    I rebuilt the bike using a combination of spare parts I had laying around and new or used parts I got good deals on. I also reused the seat, cranks and brakes from the original bike. Here are the main components I replaced:


    • RockShox Reba Race dual air
    • Shimano XT M8000 11 speed shifter, rear derailleur and 11-42t cassette
    • Race Face 30t narrow-wide chainring
    • Stans ZTR Crest 24 holes laced to Novatec D771SB/D772SB hubs.


    The Truvativ Howitzer Blaze cranks were initially 165mm. I shortenned them to 140mm, reducing the weight by 72 grams at the same time:

    Attachment 1077014

    Final weight of the bike is a hair under 25 pounds. Here's the final result:

    Attachment 1077015
    Attachment 1077016Attachment 1077017Attachment 1077018Attachment 1077019Attachment 1077021

    Here's the bike next to his Trek Superfly 20, for size comparison:

    Attachment 1077022
  • 06-18-2016
    jestep
    That's amazing, I'd have no shame riding that myself (purple or black).
  • 06-20-2016
    CaRaBeeN
    Can I ask what's the weight of Superfly 20 ?
  • 06-20-2016
    ghabe
    Quote:

    Originally Posted by CaRaBeeN View Post
    Can I ask what's the weight of Superfly 20 ?

    I don't have the exact weight but I believe it's around 18 pounds.
  • 05-20-2017
    Willy1130
    Hi, nice build btw! I am working on the same bike for my friend's kid. Just wondering since the original rear hub that comes with the Gromhit is 135mm, how did you fit the 142mm Novatech on it? I am thinking of getting a pair of 24in Spank Spoon for him and they come with 142mm hub. Please advise.
  • 05-21-2017
    ghabe
    It'm using the QR 135mm version, so it fits without issues.
  • 12-29-2019
    Pirmin
    7 Attachment(s)
    Hi

    This is my rebuild of the gromhit. Did the paintjob, fork, rear shock, paint, wheels, tyres brakes, gears and more.

    Used a fox rp23 rear shock lowered @100mm, rs1 100mm air fork, shimano saint brakes.

    Nice ride and my 10 year olds favorite bike

    12.5 kilos




    Attachment 1301679Attachment 1301683Attachment 1301685
  • 12-30-2019
    dc40
    Quote:

    Originally Posted by Pirmin View Post
    Hi

    This is my rebuild of the gromhit. Did the paintjob, fork, rear shock, paint, wheels, tyres brakes, gears and more.

    Nice... Sik paint job!