Originally Posted by
TDI PILOT
I recently wrote a letter to the CRB on this topic. The aluminum axles are readily available and in stock with many mini sprint suppliers. The problem is not only with the axle, its the cost and availability of hubs, brake rotors, caliper mounts, spacers, birdcages(rear uprights), sprockets, and sprocket hubs that work with the 50mm smooth steel tube. With the aluminum setup, you have infinite flexibility with sprocket alignment and rear track width. Just ask the kart guys what playing with the rear width can do for handling fine tuning.
-Eric :checkered: