What size wheels and tires will fit in the rear without rubbing/scraping?
In general, it appears that up to 11 wheels (which will support a 315/35 tire without problems) will fit the rear, as long as the offset is modified. The primary area of concern is an IRS bolt that is only about 1.5 from the stock wheel/tire. Any custom wheel will need to keep this clearance. In addition, without suspension modifications, adding wider wheels may not improve grip. However, most have had good results from 315/35 Nitto tires on the stock rim. They appear to fit without issue, and provide a large improvement in traction. Be aware, however, that the Nitto tires appear to be unique in this aspect. Other brands do not appear to fit properly at the 315 size on the stock rim.