So i have read the proper tire sizing thread and it all makes sense but i have got to make sure, i found some rota boost wheels, 18x9 with the offset is +30mm... the problem is i would rather have these in 18x8, but what i'm asking would these fit? what modifications would i have to do to make them fit? Or would i be better going eith 17x8 with +35mm offset? and what is the hub bore? never heard of that before... thanks!