The GT Bump 2013 BMX bike is built to take on the dirt track, whether you're going bump in the night or day.
The GT Bump 2013 BMX bike has a strong and powerful 25-9T drivetrain, a chromoly down tube, head tube and top tube and sturdy Tektro U-brake for reliability. GT Sandbox Dirt tyres are designed with dirt in mind and the Alienation Black Sheep rims are perfect for bumpy ground.
Colors: Black, Gray
Frame: 2013 GT Dirt Design S/S, Cr-Mo Main Tubes (H/T, T/T, D/T), DT Gussett, MID BB , Seat Stay Mounted U-Brake, Removable Rotor Guides, Integrated 1-1/8" H/T
Fork: GT Dirt/Street Design, Hi-Ten 31.8- 28.6mm Tapered O.D. Blades, Cr-Mo Steerer, 320mm A/C, 3/8" axle
Chain: KMC Z410
Crank: GT Tubular Cr-Mo 3Pc., 175mm Arms, Cold Forged Cr-Mo 19mm x 8T Spline Spindle, 5mm 25T GT AL Chain Wheel
Bottom Bracket: MID Sealed Bearing
Pedals: GT Low Profile Large Size Platform Design, PP Material, Boran Axle
Cog Set: 9T One Piece Driver
Rims: Alienation, Black Sheep F/R, Double Wall 32F/36R Hole
Tires: GT Sandbox Dirt Tread 20"x2.1" F/R
Hubs: GT Alloy Body, Sealed Bearing 3/8" Cr-Mo Axle, 32 Hole
Rear Hub: Sealed Bearing 14mm 9T Cassette 36 Hole
Spokes: 14G
Nipples: Brass
Brake Levers: Tektro XL320 Alloy
Handlebar: GT 100% Cr-Mo, 690mm Width, 210mm Rise, 11 Degree Sweep, 3 Degree Tip, Taper Cross Bar
Stem: GT Top Load Design With Cold Forged Clamp, 50mm Ext
Grips: GT Wings Logo 130mm Single Compound
Headset: FPD, 1 1/8" Integrated Design 45 x 45 Degree Sealed Bearings
Saddle: GT Dirt Design Unifed Padded Saddle w/ Post
Seat Post: Integrated With Saddle, 135mm
Seat Clamp: Alloy, single bolt