[Favali]

Great thread.

Please explain what the letter designation means and the effect a wider wheel has on an Alfa.

E.g. My 93 Spider Veloce has 6J x 15" wheels.

Is the 'J' a profile shape of the wheel rim?

If the 6 is its width, what concerns do I need to have if I move to a 15x7 wheel?

This has a contemporary concern as I am getting prices for Panasports and they are available in 14x6, 14x7, 15x6, 15x7, and 16x7 sizes for Spiders.

Thanks ....
-Rob