I have been searching for good strong hubs for my wheels , heres the problem, I have learned that the engine will stress my hubs axels an bearings hard in various threads here , I would like your recomendations on the best rear hubs an front hubs out there that will allow me to keep my 7 speed rear gears an add disc brakes front an rear . I am using a grubee motor s.b.p jack shaft an stronger derailer. (i havent decided on the derailer yet)