You won't like the results if you over gear. Your truck will be sluggish. If you have an automatic transmission, it will downsift a lot too. I went from 235s to 10.5x31 on my f150, and soon thereafter had to buy a new torque convertor. My T100 had 10.5X31s on it when I bought it, and when new-tire-time came, I got it closer to stock with 9.5X30s and the performance improved a lot, the downshifting stopped, and gas mileage went up. The fender wells aren't as full, but it was worth it. I'm going to put 4.88s in my 87 4runner before I 'over-tire' it.

98 Taco 4WD