Minimum side clearance on slicks?

I say stick with what you have and see what happens If you start rubbing then make some changes no need in spending time and money on something that "may not work" just my opinion. Iv seen alot of race cars run on mini tubs and have alot less than an inch clearance and never have a issue. Some ppl just have to push their "knowledge" on others and make you feel like your stuff is not as good as theirs. No offence to your friend. But it happens alot.