I was wondering peoples opinion on 15" tires vs 18" tires my brother is always talking smack about my 18" rims and tires and would never buy anything bigger then a 15" because he says you cant get tracking. But I have a set of M/T drag radials on my 18" bullets and they stick ALL day on the road. Both cars are street driven and I relize 15 would be better in the track for a bigger side wall but neither car see's much track time. So is one better then the other for street use?