Wheel and tire size for 1983 coupe quattro (help)

[Keng <kys@rivtow.com>]

I have a 1983 Audi Quattro Turbo Coupe.

	I recently updated the wheels to 16" * 7" and 225/50/16 tires.
the rear tires rub when I hid speed bumps hard. I don't really want to
roll the fender lips. The front right tire rubs the charcoal canister.
I am going to raise it a little (the canister), hopefully this will fix
that. 

DOES any one know what is the maximum (or best) tire size for my
situation ? (with the 16" * 7" wheels)

													...Keng    kys@rivtow.com