Originally Posted by happystroker
its an f250 srw xl model so it came with 17" steel wheels and some real small tires... i assumed they were around 31's.....
They should of been 245/75-17, which is 31.5". Or 265/70-17, which is also 31.5"
I did not know the tires on the 17" rims were that small. You should be able to use your mini max to recalibrate. If not, it really isn't that big of a change.
I went from 32.8" to 34.6" which caused everything to be off by 6%. I had the dealer callibrate mine to 34.8 (stock 20" rim size).