Bump

GT's Bump is a mid-level dirt jumping and street bike. Designed to take on dirt jump tracks and urban features with equal style

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Specifications Geometry Features
  • Extras:
  • Frame:
    Updated GT dirt design, cr-mo main tubes and stays, integrated 1-1/8" headtube, new 19mm CS, new DT gusset, new SS and CS bridge, new dropout, Mid BB, seat stay mounted U-brake
  • Fork:
    2010 GT dirt/street design, Cr-Mo 1-1/8" steer, cr-mo 31.8mm blades, 6mmT. Dropouts
  • Crankset / Chainwheel:
    2010 design tubular Cr-Mo 3pc., thread-in chianwheel pin, 8 spline, single bolt clamping, 175mm / 2010 design 25T steel GT design
  • Bottom Bracket:
    Mid size sealed bearings, 8 spline Cr-Mo axle
  • Pedals:
    GT Dirt/Street platform design, PC material, cr-mo alxe
  • Chain:
    KMC Z510
  • Rims:
    Alienation PBR, aluminum, 32 hole front, 36 hole rear, 31mm width
  • Front Hub:
    GT branded, aluminum body, sealed Mech. bearings, 3/8" Cr-Mo axle, 32 hole
  • Rear Hub:
    GT branded, alloy body, cassette with 9T one piece driver, sealed Mech., 14mm high carbon axle, 36 hole
  • Cog set:
    9T cassette
  • Spokes:
    14G
  • Nipples:
    Brass
  • Tires:
    Front: Kenda K-Rad 2.125" Rear: Kenda Konxsion 2.1"
  • Front Brake:
    Alloy side-pull caliper
  • Rear Brake:
    Tektro, FX340R, coil spring, melt forged aluminum U-brake
  • Brake Levers:
    Tektro, 273A, aluminum, hinged clamp
  • Handlebar:
    '07 GT Pro size dirt/street dual radius bend, Cr-mo, 7.67" rise
  • Stem:
    2010 cold forged GT freestyle drop design, machined GT logo
  • Headset:
    FPD, 1-1/8" integrated, Campy sized 45x45 degree bearings, alloy top cap
  • Grips:
    GT Wing shroom design
  • Saddle:
    Pivotal street design, GT cover
  • Seat Post:
    Pivotal alloy design, 200mmL.
  • Seat Clamp:
    '08 GT CNC mini design
  • Freestyle

    • Freestyle

      2010 La Chiva Frameset
      2010 La Chiva
      2010 Calafia
      2010 El Centro
      2010 Performer
      2010 Zone
      2010 Slammer
      2010 Finale
      Bike Comparison for BMX/Freestyle Bicycles
      Just make sure your bike can keep up.Sure you’ve got moves and sick skills. But you need a bike that’ll showcase them? Take a hint from Dave Dillewaard who hits it all - from street to park, Dew Tour to X-Games - on his GT. We’ll give you all the performance we give him: micro-sized gearing, a mid-sized bottom bracket, bombproof build. You’ll be shredding like Dave in no time. Yeah, right.
  • Dirt/Street

    • Dirt/Street

      2010 Fueler
      2010 Bump
      2010 Fly
      Bike Comparison for BMX/Dirt/Street Bicycles
      Skinny jeans. Neon colors. When you’ve been building bikes as long as we have, a lot of things come and go, then come back again. But one thing has never changed: Our passion to build bikes that can handle any old-school trick you can throw down on them.