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Message: [QUOTE="2012f350drw, post: 1318912, member: 24110"] I'm soon to change my 2012 F350 DRW with 3.73 rear end from stock LT245/75R17E tires (31.5" tall) on 17" x 6.5" wheels to LT295/65R20E tires (35.5" tall) on 20" x 8.25" wheels. This is a fairly significant tire size increase so my speedo and odometer will be a good bit off. What is the best way to correct this and to ensure no error codes? I am running stock program (no tuner). It's my understanding that the Ford computer (even at dealers) can only change to what Ford offered in F350's in 2012 which the largest would be an approx. 34" tall tire on 20" wheels with a 3.55 rear end offered in the single rear wheel F350s. So even the dealer cant completely solve the problem. There are so many on this site with larger tires (than stock) so looking for everyone's advise. [/QUOTE]

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