So what am I giving up with a "P" vs an "LT"? Sidewall durability? Overall durability?
I saw that Scott has 33's but I think he began with 19" wheels, right?
No, Scott originally took the stock 19's off and ran oversized Micky Thompsons on 20's until they figured out how to get the 18's to fit.
LT typically has stronger sidewalls and more "ply's" than non LT tires but the ply's thing is something I am still trying to understand as some manufacturers sheets state things differently than what makes sense to me.
But in theory the LT tires are stronger because they can support higher weights than the P spec tires. P spec tires will be softer and ride better because of softer sidewalls.
This added strength and weight handling ability comes with a weight penalty. With the Toyo AT2's I know that from a P spec to LT tire there is about 12-14 lbs difference at each tire. This will decrease your mileage along with the larger size of the tire from stock causing more resistance. I would be prepared to lose at least 2 mpg going from stock to the 265/65.