So, does 235/45/18 or 235/50/18 size fit my countryman stock 18inch rims with sports suspension? (Sport suspension is 10mm lower than normal suspensions too right?)

But 225/50/18 fits perfectly right? no rubbing during cornering or ramp jumps? haha how about 235?

Please confirm thanks!

 

I'm looking at the Bridgestone Potenza RE960AS RFTs which were reviewed favorably for a RF tire but I can't find a match to my current tire size. Closest is 245/40R18 but I don't know if these will fit. The section height is about the same but the tire will be 0.8" wider.

If they came in a 235/45R18 size I believe that would fit - the tire is only 0.4" wider than the stock 225/45s, and the section height is only 0.2" more. I don't know about the 235/50s - that gives a 1.2" larger diameter tire vs the OEM size.