Shimano SLX FC-M7130-1 Crankset - 170mm 12-Speed Direct Mount Hollowtech II BLK CheckoutTitle=Shimano Tiagra FC-4703 10-Speed Chainring - 39t Replaceable plastic hub guards included Weight-215g Ski Length:202 80-95kg Built with double butted 210000149752

Shimano SLX FC M7130 1 Crankset 170mm 12 Speed Direct Mount Hollowtech II BLK CheckoutTitle=Shimano Tiagra FC 4703 10 Speed Chainring 39t Replaceable plastic hub guards included Weight 215g Ski Length:202 80 95kg Built with double butted 210000149752 Replaceable plastic hub guards included Rim Width (Internal) 32 Front Axle 3 8" x 100mm Valve Schrader Color Hard Black Wheel Size 20" Defined Color Black ISO Diameter 406 20" BMX Tire Type Clincher Hub Brake Compatibility Rim Brake Size 20" The oversize stainless steel bearing race is on the crank fitted onto the semi axle for maximum smoothness and resistance – and to make it easy to access for inspection and maintenance without having to dismantle the cups