I remember a user on one of these forums did that. He went by the nickname Timmac. You might look him up he's either on here, RV.net(probably), or IRV2.com. Search RV.net under the class C forum first. You need to be careful that with bigger tires the duells don't rub each other on the inside, and find out about clearances and turning radius etc. Maybe replace your rig with an Earthroamer
just kidding.