Im possibly swapping my rims and tires with a member on here and he needs the spare.Thing is i dont have the spare with the 20's i called ford to see and they dont offer a 20 inch steel spare they say its a 18 inch steel spare that comes with the truck.Any one know for sure what size spare comes on there with factory 20's?Unless they come only with 20 inch alloy rim for spare.

 

I doubt they offered a 20 inch spare wheel.

 

It is in fact an 18" steel wheel spare. I think the tire size is 275/65/18, but I could be wrong.

 

Great thats what i wanted to know thanks guys.

 

It is a 275/65/18 for sure.

 

My basketball coach had a flat on his 06 KR with factory 20's and his spare was a 275/65R18 Goodyear Wrangler from the factory.

 

thanks everyone

 

It doesn't matter what size rim you are going to have, as long as the rim will fit on the truck. What you care about is that the final diameter of the rim/tire combination is the same between the regular tires and the spare. It can be a 17" rim, and assuming the final diameters of the 20s is the same as a 275/65R18, a 275/70R17 tire will be the same final diameter.

 

I agree.