Recalibration of the Bronco's Speedometer using ForScan for those Larger Tires - How hard can it be?

Today we are using ForScan to input the bigger sized tires’ circumference. Stock tires had a circumference of 2475 mm. You can do this 2 ways. You can input the tire size information into a tire calculator and it will give you a number (it may not be exact). Or you can do it the way Jill is going to do it with string, tape, and a tape measure. Always do a control speed test. We used a gps speedometer on my phone that jill held while I drove for each test run. Jill is doing most of this video by herself again. She will physically take a measurement with string, lay it out straight on the ground without stretching it, and measure it, then convert inches into millimeters (because ForScan and computers in vehicles uses millimeters) and get the new number - which was 2737. Set up the ForScan to the steps shown in the video, get to Body Control Module - the one without AS FROM FACTORY next to it. Either double click or hit the play button. The screen will pop up with a FILTER option. Type in TIRE. Hit enter. The three things for tire will pop up - click the MIDDLE one. Input your new tire millimeters size in, hit the check mark and then write, the computer you are typing on will ask you to cycle it. Do so. Do a test run. And let us know how you made out! It took us a couple of tries, but we ended up at 68.9 mph and we are good with that. We think the magical number for the Big Bend is 2618 mm. Well, hope you like the video, please like, subscribe, hit the bell icon so you don’t miss an upload, drop a comment down below, and if you want to contact us - feel free to DM us on Instagram or reach out to us via website. See you on the next one! Bye! https://tiresize.com/calculator/