My combo isn't too aggressive and I don't think I need 28", but a couple of my buddys tell me to get 'em. I've raced my car 5 times at the track with 26" and have cut 1.789,1.782,1.72,1.70, and my best of 1.68 60's. I don't want to break anything if I run 28". Is there a hp limit up to where you can run 26"s?