Hi,

I apologize if this has been covered. I am considering swapping 225/50r16 tires for 205/50r16 tires to both save some weight and lower the gearing just a little in my 1.9l z3. I don't think a .8 inch diameter change would affect the look that much (?), but would slightly (3%) lower the gearing. And I don't think the .8 inch narrower tread would affect grip that much in spirited street driving.

But I doubt my thinking is original. If anyone has experience in trying to increase performance a little in low hp cars with tire size please respond.

Thanks!