What size tires?
 

Ive had my truck for 2 years now. It had 35x12.5R20 toyos on it. Its past time for new tires..just wondering if i could step up to 37x13.5R20 s? Or would they be too big? (As far as clearance with the bumper on turns and rubbing on the leaf springs go)
I believe it has a 6" superlift lift kit on it.
Thanks guys!