Lou Hamilton
Full Access Members
add the difference of the new tire to what is by default in FORScan. What’s there takes in account the weight of the vehicle squishing the tire down! Again why I only added .5” (12MM) to my tire height.
Also, you don’t need to input/mess with the HEX in FORScan. Just go into this and add the new +X MM there. Then go to TCM relearn & clear the DTCs. BAM your good!
If that still throws the wrench but you have accurate speedometer then a custom tune you will need!
It doesn't really bother me and it seems like it doesn't cause any issues.
A tune was something I was considering at one point. Not sure when, but maybe some day.