CR-MO Unicycle Size: 20", 24" CR-MO Unicycle Size: 20", 24" Fork: Square top clamp type fork Hub: Steel , CP; Alloy ,Cr-mo axle Spoke: 14G*36H, stainless or CP Crank: Alloy 5"for 20" ,6"for 24" Pedal: 2-tone with all weather non slip, Alloy silver, Rim: 20",24" with double rim, silver or black/CNC Tire: 20",24"* 1.95 black, the PAHs free Saddle: Black,PU ,with color grip and protector ,the PAHs free Seatpost: alloy ,300mm length or size to order Certificate: TUV/GS approved