Search found 1 match

by JraySD
Fri Apr 09, 2021 4:36 pm
Forum: Beta testing
Topic: Setting arbitrary tire sizes for speedometer calibration
Replies: 141
Views: 133028

Re: Setting arbitrary tire sizes for speedometer calibration

I changed my speedo yesterday for a 285/60/20 Toyo AT3 on my 2018 F150 2.7l. I tested it and it was very close. Speedo showed 70mph. GPS showed 70.1mph
I then drove to work this morning and my speedometer was off. At 60mph I was going 72mph. How did it revert back to being off? Please advise.