bumps are no problems to me, its all flat down here where i love, so i drive my car slammed now on 15's, so i just wanna swap out my 15s and put 17's or 18s on so it will look more tucked, i cant do that with 15s since the tire is too thick, but with 17/18's i wont need to drop it that much in order for it to tuck right? and is it true that if i get 18's it will make my car higher? if so i rather just get 17's

what offset is the best for tucking?