They work AWESOME on heavier rigs, not sure about light stuff. My buddy runs 35's on his fj62, he makes it over alot of stuff without a rear locker that fully built rigs have a hard time with. If I could go back in time, I would get these over my km2's (even though my km2's have been great tires). I would have bought these, but 37's were on backorder at the time