Search found 2 matches
Search found 2 matches • Page 1 of 1
- Wed Jun 07, 2017 1:12 pm
- Forum: Beta testing
- Topic: Setting arbitrary tire sizes for speedometer calibration
- Replies: 108
- Views: 105416
I've worked out how to program any tire size you want in the BCM, which enables you go get a very accurate speedometer reading even if you have oversized non-factory tires. In all of the current model year cars I've looked at (Explorer, Fusion, Mustang, F150) the tire size is stored in the second f...
- Wed Jun 07, 2017 12:50 pm
- Forum: Diagnostics and Maintenance using FORScan
- Topic: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
- Replies: 5
- Views: 5392
My XLS came with 255/70/16 tyres. The formula to figure out the nominal circumference of the tyre size is ((255 * 70 * 0.02) + (16 * 25.4) ) * Pi(3.14159). Result is 2398.2898. Multiply that by the conversion factor of 96.7% and you get 2319mm rounded off. My “As Built” HEX at address 726-12-01 is ...