Type: Carbon Fixed Gear Track Bike; Frame: Track Bike Carbon Frameset BXT-045; Weight: 8.1kg+/-0.3kg; Frame Size: 700C*49/51/54/57cm; Fork: Track Bike Carbon Hard Fork BXT-045; Road Handelbar: Carbon fiber Road Handlebar Width:420mm Stem: Alloy Stem Length:80mm; Seatpost: Carbon Seatpost; Headset: Tapered 1-1/8 to 1-1/2; Cranksets: Aluminum Alloy 170mm*53T Single Speed; Bottom Bracket: Thread Screw-in BSA 68mm; Brake F/R: None; Wheel Front: 5 Spokes Carbon Wheel; Wheel Rear: Closed Carbon Wheel; Hub Front: 100*9mm; Hub Rear: 120*9mm; Wheel Width: CST 700C*23C Black; Saddle: Full Carbon Soft Leather Saddle; About Color: Need other colors or custom colors, please contact us; Our Online Shop：www.bxtbikes.com