Tensor Alloys Raw Skateboard Trucks Size: 4.25 / 4.75 / 5.0 / 5.25 / 5.5 Raw Set of 2 Trucks Features: Tensor Alloy - Best Grind. Best Turn. Best Truck. · Raw Grind. · Fast Turn. · Traditional Aluminum Alloy. View More From Tensor Trucks Guaranteed For Life. Tensor uses the finest metals and manufacturing processes to produce the best quality skateboard truck on the market. Tensor stands behind their product and guarantee all of their trucks for life. The lifetime guarantee covers your trucks against manufacturer defects and overall craftsmanship.