35 12.50's on 17x8s no rubbing issues at all, mpg only dropped about 0.5 mpg. Auto tranny, 3.73s.

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Thanks for the info guys.

Woligator, you told me what I was thinking. On the highway, I would expect better milage, but in town it would be worse. I don't do a lot of heavy towing. Maybe once or twice a year, I will pull a load of around 10,000 lbs. The rest of the time is just daily driving or towing someing any truck could handle. I guess since that's my norm, I wouldn't have any really bad performance problems. I certainly not out on the streets racing! Thanks again.

 

I just put on a set of 305/65/17s on stock rims and have no rub even without leveling. Any bigger and I'd probably need a leveling kit though.

Still on the first tank of fuel since the change, so I don't yet know what mpg difference I'll see, but so far it doesn't appear to have changed it much. Like Woli I do most highway running. So far, the fuel gauge is about where it normally is after a day and a half on this tank.

I have seen about a 300 rpm drop at 75mph though, so that should be a good thing.

 

with a leveling kit you can fit 315/70/17 with no rub on the stock wheels... And expect to lose 1-2mpg and all overhead info and speedo will be off.....at least thats what i have had happen to me