Just picked up a set of new take off 17" chrome XLT wheels, and a set of Blizzaks for the winter (2657017). I have the Roush 20" wheels with 2755520 on the truck now. With winters around here, I wouldn't dare leave the 20"s on. My question is, would I need a programmer to input the new tire size, or are they close enough. I dont know how sensitive the new trucks are to change. I put them side by side, but I don't know if thats good enough.

 

They are roughly the same size, less than a 1/2 inch difference in overall diameter. So you really would need a tuner for the adjustment. To check tire sizes you can use this calculator:

http://www.1010tires.com/TireSizeCal...?action=submit

 

There is not enough difference to even worry about.

 

I apologize, my post should've said "wouldn't need a tuner."

 

thanks appreciate it. i got way too good of a deal on both to have to turn around and sell them.