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33's are a fairly small tire in todays world of 40" tires. Since even the average off-road tire size is so much larger then yours, 33" tires will give a serious improvement off-road. They will help you get closer to other's ground clearance, protect the vehicle with wider tires, more stability, ect. Negligible effects for highway performance.


Here's another view.

I ran 31's, 32's and 33's on my Gen 2.5 and saw very little difference off road, except the 33's rub and provided lackluster power. 32's were the best fit for that truck.

If you go with the 33's get wider rims, or run 10.5's and a different backset and do a body lift.

The folks who are running the big tires, 35's, 37's etc. have also change their gearing.

Have you been off road with your current tires? How did they perform?

I've never seen a Montero with 40" tires?

Michael j

TreadLightly! Trainer

Grasscat III, 1994 Gen 2 Five speed, Stock ( for a little while )

GrassCat II, 1998 Gen 2.5 Locked and loaded. Ran off with Hector.

GrassCat I, 1991 Gen 1 Ran off with Justice.