[Cummins6speed]

Would I be able to run an 8.5" wide rim with a 12.5" wide tire or is that too small?

 

[brogdog13]

A 12.5 equals 317.5mm and the going minimum for the 315/70-17 is 8.5 inch wide rim, well at least discount tire won't mount the 315s on anything smaller than 8.5.

 

[smokedrail]

It will work for just don't want any smaller wheel

 

[Cummins6speed]

okay well I found a 9.5" rim so I am good to go anyway, I may go up to 13.5" wide tires though

 

[PuffPuffPass]

I run 35X12.5X17 Toyo MT's on stockers, which are 7.5 wide. I have pulled a 12,000lb trailer with them and had no problems. You would be better off with a 8.5-10 inch wide wheel, you'll get better wear on both tread, and sidewall life.

 

[Cumminsturbo22]

make sure that offsets right!

 

[Gixxer_750]

i run a 14" wide tire on an 8" wide wheel...running the tire at 8 psi or less and i havent popped the bead off yet...this is on a gasser though...you should be fine w/ the 8.5:thumbsup

 

[Cummins6speed]

make sure that offsets right!

What offset do you suggest

I have been told stay within 5.5-6" back spacing with a 3"leveling kit