Have 2007 17" Crown Spokes with 205 45 17 mounted on my 2003 MCS with stock suspension and brakes. Want to go to non-runflats for a better ride and understand that 215 45 17 will also fit without clearance problems ...is this so ? thanks

 

going up from 205 to 215 will increase your rolling diameter from 24.26 to 24.62, which is ~1.5% larger, which *should* be OK, but keep in mind that your speedo and odo will read that 1.5% too low (IE, you will be going faster than your speedo says)

 

yah, but that speedo difference is like within the tire pressure tolerance.

from a dressup perspective, those new R56's need a thicker tire to withstand
the boldness of those huge fender arches, unless you paint them. looks
unbalanced.

 

Yes, you are fine, the 215/45-17 is taller than stock and wider but it's close enough.

If you do lower your MINI then you can start to get a little rubbing in the rear outer edges.

Which tires are you going with?

 

Thanks for the advice...went with Kuhmo AST 215 45 17..am very pleased as the ride is much improved and the car looks "beefy".....