i'd say it depends on how much you are dropped. i have no finger gap on 225/40/18s and if i go to fast on a bump i'll rub. you prolly can go 235 on 7.5 but i never heard of it so 8.0's shouldn't be a prob. keep some space between there and you're good. what rims did you find in that size? goin for a staggered fitment?