Built for getting into BMX, the Amp Jr is a modified version of the Amp 20. Still based on a 20-inch wheelset, the AMP JR has smaller frame, bars and stem making this bike easier to manage while still maintaining a true BMX feel. 25/9 gearing, 3 piece cranks and added clearance on the frame, fork and brake for wider aftermarket tires means this bike has all the basics as well as the newest features in BMX. Keep down time to a minimum with low maintenance components like fully sealed rear cassette and sealed Mid bottom bracket.
NEW FOR 2016: Wider and stronger pull U-brake for 2.4 tire clearance, top load stem.
Top Tube Length: 18.5"
Frame: Hi-tensile steel frame, HT(°): 74.5, CS ("): 13.25, SO ("): 8, BB ("): 11.5, ST (°): 71
Seat Clamp: Alloy
Fork: Hi-tensile steel, 2 piece
Handlebar: H: 8.0", W: 28", hi-tensile steel
Stem: Alloy top load - 40mm
Grips: Mushroom 147mm
Headset: Standard unsealed 1-1/8"
Brake: Wider pull U-Brake for 2.4 tire width
Brake Lever: Alloy for U-Brake
Cranks: Chromoly 3 piece, forged 165mm
Bottom Bracket: Sealed Mid BB 19mm
Sprocket: Steel, 25T
Pedals: Wellgo plastic 9/16", chromoly spindle
Front Hub: 3/8" unsealed, 17mm axle nuts
Front Rim: Alloy single wall 36H
Front Tire: Innova 20 x 2.25
Rear Hub: 14mm, fully sealed cassette with 9T, 1 piece driver, 17mm axle nuts
Rear Rim: Alloy single wall 36H
Rear Tire: Innova 20 x 2.25
Seat: Padded seat w/rails for more adjustment
Seat Post: Alloy post w/steel guts