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by fromdetroit7
Sun Apr 28, 2019 6:44 pm
Forum: Beta testing
Topic: Setting arbitrary tire sizes for speedometer calibration
Replies: 85
Views: 76854

Re: Setting arbitrary tire sizes for speedometer calibration

I have a 2013 F-150 XLT supercrew 4x4 w/off-road package and I bought it new from the dealer who had a 6" pro-comp lift and 35x12.5R18 Nitto tires installed. The dealership provided me with a hypertech speedo calibrator with the purchase. However, the speedo was always 5mph faster than actual speeds...