New optional rear wheel axles manufactured for XRAY by HUDY from the world-famous top-secret "Hudy Spring Steel(TM)"; a direct replacement for the original duraluminum rear wheel axles.
These new wheel axles will be virtually impossible to damage or wear out. The wheel axles are strategically CNC-machined so they are as light as possible to reduce rotating mass, while maintaining ultimate strength.
305311 is standard on the Factory Kit