Up to my knowledge, Callisto's were only made as 20" x 9J wheels. There are no 8" wide Callisto's for the X350/358.

 

the 8" could be a misprint in the JCNA Concours Rule Book. Aleather, you should measure the width of the wheels. I'm guessing Paydase is right and this is a non issue for you.

 

Yesterday, I wrote down all the numbers on back of the spare wheel and it didn’t even click than that the size was right there in those numbers. When I read paydase’s post, I told my girlfriend, that now I have to confirm what size wheels I have and she said, “The size should be on the wheel”! And she was right...”9Jx20CHx49.0”. Now to fix the balljoints / rubber boot issue and maybe replace all the bushings - car klunks a bit only when hitting certain bumps.

20” wheels really do suck when hitting potholes. <grin>

 

The joys of 20" Wheels. This is the second time I've had to replace bulbs in my heater control. Convinced its from the rough ride on those 20" wheels.

 

What I can tell you now, having done several hundred miles on them, is I am now entirely happy with the ride comfort on my 2007 Sovereign, now on 17" 'Elegant' wheels. My teeth fillings are now secure !!