Is there any way to get a 345 tire on the rear with a 18" Rim?

 

I'm thinking you'd need at least an 11in. wide rim back there for that. I don't know of any off the top of my head, without getting them widened.

 

I have a friend that put 345 on a 13 inch wide wheel, they were some massive meats, He also had to minitub the rear. wheels this wide are custom made (ccw, trueforged, iforged, hre, or widened mass produced wheels.0

 

O wow,I just like the look of it but If I need to minitub the rear then its too much,and whats the widest tire for a 10" rim?

 

Yeah, 345's would be quite an investment. On a 10in. rim, I think the widest recommended is 295-ish...

 

305 should be fine