The Montana 250cc trike conversion kit comes complete with a differential rear axle assembly, all mounting hardware, bearings, axle housings, wheel hubs, and components to mount the trike conversion kit to the bike. Completely bolt-on no welding necessary. This kit can be installed in a matter of hours. Kit comes with instructions but some mechanical skills are required. Please read all information or call if you have any questions. 913-710-2225 We can also complete the conversion for you! Please Call 913-710-2225 for more details on how we can help you convert your bike into a trike.