Bike Frame:High-Carbon Steel Gears:21 Rim: 12" 14" 16" 18" 20" Grip:PVC, TPE, foam rubber, Saddle:Full decorated PVC cover Brake:F/R Caliper Brake/R band brake/V brake Flywheel: 16T/18T/20T Brown/Black/CP Mudguard: plastic,steel ,CP Color: red, black, blue, green, yellow etc. any color you like Age for child:5+ Years old