26 X 17inch Mountain Bike 21 Speed High Carbon Steel Frame Damping Bike Bicycle Cycling Specification‎:‎ Brand‎:‎ SMLRO Material‎:‎ High Carbon Steel Size‎:‎ Show as pictures Damping‎:‎ Yes Bearing weight‎:‎ 150kg Weight‎:‎ 20kg Speed‎:‎ 21 Color‎:‎ White&Red‎,‎Black&Red Bicycle frame‎:‎ 26*17inch Configure Details‎:‎ Model SMLRO‎-C6‎-EF51_7 Paint Germany electrostatic paint technology Frame Thicken high‎-carbon steel frame Fork MOZO high carbon steel damping fork Handlebar Thicken high‎-carbon steel handlebar Riser Thicken high‎-carbon steel riser Saddle tube Thicken high‎-carbon steel saddle tube Seat Ergonomics MTB hollow seat package Saddle tube clamp Aluminum alloy quick release buckle Left DIP SHIMANO EF51L 2A Right DIP SHIMANO EF51‎-7 R AL Front derailleur SHIMANO FD‎-TZ30 Rear derailleur SHIMANO TZ50 Crankset PCB24*34*42 locate crankset Axis LP‎-BB68 waterproof axis Flywheel Quiet Location flywheel Rim Aluminum alloy integrated wheel Outside tire 26*1.95 black tire Inside tire ORANTE inside tire 26*1.95/2.125 Chain 7‎-speed chain Brakes Mechanical disc Line pipe Black Brakes handbar SHIMANO aluminum alloy brakes handbar Pedals Half aluminum Pedals with bead Seatpost 27.2 thicken seatpost