I?m sure this has been brought up but I tried looking and didn?t see any thing that answered my question.
07 Colorado 2.9, I?ve got larger tires on it and have been trying to dial in my speedometer for the last week or so. Tire measured 30 and 3/4. I have the revolutions per mile set at 645.5 (before I just went off a 31 inch measurement at 651) and I?ve seen virtually no change im still off a couple mph. What am I doing wrong? Thanks in advance
