Tensor Magnesium trucks feature a special magnesium alloy which makes for the lightest skateboard truck on the market. These trucks are 25% lighter than the industry standard and the geometry provides for fast and smooth turning. Tensor uses the finest metals and manufacturing processes to produce the best quality Skateboard truck on the market. The 5.5 hangar measures 8.125" from axle tip to tip, making these trucks perfect for boards sized 7.9" to 8.5".