Independent Trucks is the #1 choice of professional skateboarders since 1978and Built to Grind! Skateboardings most iconic brand and leading manufacturerof skateboard trucks, hardware, clothing, and accessories.Ride the Best Durable, high performance truck for all types of skateboarding 356 T6 Aluminum hanger and baseplate, solid Chromoly steel axle, grade 8 kingpin, Supercush cushions with cylinder bottom Featuring superior turn and stability, better grind clearance, improved no hang-up yoke for grind tricks, and less wheel bite. They last longer and are stronger on impact than any other truck on the market.Independent trucks are Made In The USA and Guaranteed For Life Accept No Substitutes. IndependentSizing: Truck Size Hanger (mm) Axle (in) Board Range (in) 129 127.00 7.6 7.4″ – 7.75″ 139 137.00 8 7.75″ – 8.25″ 149 150.00 8.5 8.25″ – 8.75″ 169 160.00 8.9 8.75″ – 9.75″ 215 183.00 10 9.75″ and up