if that is already 5 inches wider than stock, is it done with off set and spacers already or???
I don't think I would want to go any wider than the 5 inches you state its at now, as its would I think add a lot of stress to parts
Before I would make wider spacers I think I would just add a dual wheel set up like deal, all around,
but that will end up robbing a TON of power, and a Gear reduction for sure to do any serious riding IMO