Did a little digging, and found a pic from last year, when I was still "in process" with the C520.
Here's a good comparison of the sizes. The inners are 23x10.5's on 8.5" wheels. The outers are 23x8.50's on 7" wheels.
Hope that's what you were wanting to see.

If you REALLY want fat-azz, here it is with (4) 23x10.5's on 8.5" wheels across the back.