For racers looking for smart weight savings and optimized rotating weight, XRAY offers this ultra-lightweight solid axle as a direct replacement for the standard diff or Multi-Diff™. This axle is 56% lighter than the standard Solid Axle, with a hollow axle for super-low rotating weight. The ultra-strong 1-piece solid axle is CNC-machined from world-renowned HUDY Spring Steel™, and includes lightweight aircraft aluminum pulley adapter. (click to enlarge)