7 ply North American Maple pressed individually using epoxy making a strong, responsive deck with long lasting pop and consistent concave and kick. Deck Measures 8.0" x 31.6". Durable, high performance truck for all types of skateboarding. 356 T6 Aluminum hanger and baseplate, solid Chromoly steel axle, grade 8 kingpin, Indy 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. 55mm ride height. Standard 4-Hole Baseplate. 139s measure 8.0" from axle tip-to-tip. Recommended deck size 7.75" - 8.25". Includes 2 Trucks. 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. Many Pro skateboarders ride on Spitfire wheels. Not only are the wheels top quality but the graphics are awesome. Spitfire wheels are hard to get your hands on and always sell out quickly. Get yours today and notice the difference.