22x11x8 straight. My 4mil would spin my 12's.. the smaller motors dont tend to turn the bigger RO tires well (from my experience).. The 24" tires usually give you around 76-80ro and are on 10" rims.. they'll cost quite a bit more then the 22" tires. You can find 22" 14pdl extremes on rims for around 420 bucks.. give or take..