Greetings. Coincidently , steel axles are available (see rjspeed-Bolink ); with an appropriately placed spacer, a bolink style drive shaft can be utilized ( but consider the physics-as stated in the previous reply(s)-) fiber glass axels are also a suitable replacement. Correct me if i'm wrong, Niftech had axels available. It's been awile since i've ordered from them.