Matt is the expert at cutting coils. I'm sure their is more to it then that to consider like shock length and stuff. I was just thinking and typing at the same time LOL Most people run to much pressure in the tires. I run my 33's at a max of 30PSI on the road. My Jeep is light when aired down to 12PSI you can't even tell at all by looking at them. These large tires on light Jeeps need to be aired down or they are really rough. I do think the smaller you can go the better off your on road will be for sure. Even just a 1" smaller would be good and save some weight on your axles.