So having digested all the info, what I really would like to do is fit a set of the Pirelli PZero Nero UHP RFTs onto a 2010 JCW convertible.

I don't see the stock sizes at Tire Rack and hear this is a hard tire to find in sizes.

Can it be made to work as a plus size with the existing wheel?

Any other tire recommendation in a similar style? UHP and RFT?

Thanks!

 

You won't like the run flats.
Very hard ride.

 

Yep. But am still heading in that direction.

FWIW, from what I've found, these increase the width and diameter by about .75" - these being the ones that are actually available (225 45 17 - I think). Rim width-wise, I am pushing my luck as 225 is designed for 7-8.5 RIM and 205 for 6.5-7.5 (again, going from memory).

 

Have Dunlop RF on my new JCW and I must say they are not and day better than the Bridgestone rocks that came on my 2010 MCS.