I put a 2" lift and 35" Mickey Thompson ATs on my sahara and in daily driving it seemed that the engine had some trouble pushing the tires. It would rev high even on slight inclines (but the tires looked great!). I swapped them out for 33" versions and it seems to run a little better but not as good as I expected. I would like in the near future to put in an air intake and a better exhaust pipes to get a little more HP. Would that normalize the performance with the 35" tires? As far as taking it off-road which size performs better? Any suggestions or advice welcome. I am going to check tire pressure and see if it rides better at pressure recommended on the fourm.