INDEPENDENT 139mm Skateboard TRUCKS 52mm SPITFIRE Wheels, Bearings PACKAGE Independent 139 Trucks: 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 Spitfire is one of the largest companies in the skateboard wheel business. Spitfire uses top quality U.S. made urethane which in turn makes the best and smoothest skateboard wheel out. 99A is the perfect hardness for both street and park skating. Making a great bearing starts with having a lot of expertise, and using the best materials. Bullseye uses super hard Chrome Steel balls that measure 65 on the Rockwell Scale; each ball is tested to ensure that is perfectly round. The balls run in deep-grove race ways, and are retained by a self-lubricating Delrin crown. A low viscosity synthetic oil bas been added to make these bearings spin great, while keeping friction levels at a minimum. Whether you are upgrading your current ride or setting up a new one, completing it with top-of-the-line pro components is the way to go. Independent trucks and Spitfire wheels are two of the most iconic brands in skateboarding. Full Package includes: Independent 139 Trucks, 52mm Spitfire Bighead Wheels, Bullseye Abec 9 Bearings, 1" Phillips Hardware, H-Block 1/8" Risers