18" wheels

1971 CY Dodge Dart said
The back space is 4.5” per the Ridler website.

I don’t believe I could go any larger on the tire since it’s pretty close to the fenders now.
View attachment 1716063475

Thanks for the information. We were hoping for 245 in the front and 255 in the rear. I may have to stick with the 235’s unless they offer some additional backspacing options which I don’t think they do.