225/40 wont rub, you'll be fine. And yeah, a 215/35 is pretty skinny, but it cost more than a 225/40. I think HKS springs is a 1.5' drop & that's what most people go with. You wont even rub if you drop the front 2.5" & the rear 2 1/4". That's my set up, so hope this helps.