No, Blackcel had 18's with the Sportline springs and he was fine.
Also here is tony's car:
He has 18's with Sportline springs.
that's good to know. I have 15's with the sportline and agx and driveways are not a problem. I should mention though I don't have any underbody plastics. on the semi steep driveways I just go in at an angle just to be safe. you can still scrape with the sportlines, but you shouldn't if you're careful, and that won't take long. plus you've got 18's so you have more clearance than I do.