We've had numerous customers use our Crystalyte 400 series project motor axles to build unique and innovative vehicles. Most of the time these involved supporting the hub from one side only, so we decided to have Crystalyte make us a batch of motors explicitly for this very purpose. We now have a stock of ready to go 405 and 406 hubs with a solid 3/4" thick axle and disk brake mount for the range of homebrew electric Trike, Quad, and Trailer projects. As well, we've replenished our supply of the powerful and disk compatible 5303 and 5304 hub motors for those looking for high-power setups.