Originally Posted by Allmachtige
You can run 245/50 without any modifications, and 255/50 (SSEi95 confirm this) with slight wheel well modification.
Yup, I got GoodYear GT+4'*, P255/50 R16'* on stock rims. The moddifications to the wheel wells were to pound the welded lip back out of the way. It sticks out into the well a little bit from the factory.
The traction from these are amazing (when new anyways). My next set of tires will probably be a little narrower since this is Minnesota and we do get a fair amount of snow and ice durring the winter months.