The Axle Housings in this section are empty axle housings that can be used for custom applications or to replace factory housing with a more robust housing. For complete axles with axle shafts and differentials see the Assembled Axle section.If you have the answer to the following question(s) please email them to: info@aftermarketbuildersguide.com – How wide are the axles from hub to hub? What is the axle tube diameter?