I'll provide you with my real world experience. I just bought my 2008 V6 Limited about 6 weeks ago. Within a week I bought and installed Duratrac's in 255/75/R17 on TRD Pro 17x7" wheels. My truck is 100% stock with XREAS...no lift of any kind.
I had minor rubbing that was COMPLETELY eliminated by doing the following:
- Removing the front mud flaps
- Relocating the front edge of the front fender liners about 1.5" forward by unscrewing the fasteners and redrilling new mounting holes
That's it...nothing more. I didn't even have to remove the rear mud flaps although the tires get REALLY close to them!
I've taken the truck out on some moderate offroad terrain too with no rubbing anywhere.
That's my experience with 255/75/R17 on a stock truck.
Cheers!