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
  • Race

    • Race

      2010 Power Series Pro
      Bike Comparison for BMX/Race Bicycles
      Because the world looks a whole lot brighter from the podium It’s easier to reach the podium again and again when you’re racing a bike that’s been built on more than 30 years of experience. Just ask Mike Day. He might even show you that Olympic silver medal he got on his GT. Or the World Championship medals. Or his ABA Golden Crank Award. Or the…well, you get the idea.
  • Freestyle

    • Freestyle

      2010 El Centro
      2010 El Centro 18
      2010 El Centro 16
      2010 Performer
      2010 Compe
      2010 Zone
      2010 Air
      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 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.