New from the 2013 line of GT BMX bikes, the GT Bump!-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