I like the idea of 33 x 10.50 tires.......... Narrow enough to just still fit in the fenders. And diameter-wise you shouldn't have to trim the fenders either (Plus I can keep my stock 15x7 aluminum SR5 rims).
You'll then need to make sure you have some protection underneath.............
Most tires do seem to be .5" less than stated diameter. With about .5" tread depth you'll be an 1" smaller at half tread wear and 1.5" shorter when worn out. And that doesn't take into consideration rolling diameter..... (According to tire rack, a BFG 31 10.50 has a diameter of 30.50 and 682 revs per mile; 682 revs per mile is a rolling diameter of 29.57". So rolling diameter is 29.57/30.5 = 97% )
So your average 37" tire at midlife becomes a 34.92" tire.........
And full throttle in 5th gear isn't a good idea for transmission life........
