Speedometer calibration

[XJRMan]

As title says. is there anyway to calibrate the speedometer for different size tires?

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[HuntingPudel]

I know that with some trucks it can be accomplished via OBD port. If it’s enabled in the MME, that would probably be via ForSCAN. ??

 

[tuminatr]

I know that with some trucks it can be accomplished via OBD port. If it’s enabled in the MME, that would probably be via ForSCAN. ??

For trucks my Bartec TPMS programmer allows this function.

 

[XJRMan]

Thats what I figured, is there anyone here that has it and can verify?

 

[XJRMan]

245/45/18 winter rims and tires from my Jag. If it is GPS, I could try it, I just do not wanna rack up miles on the OD, if you know what I mean?

 

[tuminatr]

245/45/18 winter rims and tires from my Jag. If it is GPS, I could try it, I just do not wanna rack up miles on the OD, if you know what I mean?

I would not use that size on a Mach E they won't support how much the Mach E weighs. It's possible they will overheat and blow out. This is even more likely in winter tires because the compound is softer.

The factory MME CR1 tire is a 225/60/18 104 XL It supports 1874lbs @39psi per tire so 7496lbs total

A 245/45/18 100XL supports 1664lbs @ 39psi per tire so a total of 6656lbs

If your tires are a 100 XL they can be safely run at 42psi and will support 1764lbs but still not enough for the MME

A 245/45/18 96 SL supports 1564lbs @ 39psi per tire so a total of 6256lbs

 

[21st Century Pony]

As title says. is there anyway to calibrate the speedometer for different size tires?

I seem to remember that the later versions of ForScan allow for this. I'm on travel now (non-Mach E for once) so I can't verify right now.

 

[roguemustang]

Calibrate? Heck mine will sometimes read 1mph when I’m still in Park.

 

[XJRMan]

I would not use that size on a Mach E they won't support how much the Mach E weighs. It's possible they will overheat and blow out. This is even more likely in winter tires because the compound is softer.

The factory MME CR1 tire is a 225/60/18 104 XL It supports 1874lbs @39psi per tire so 7496lbs total

A 245/45/18 100XL supports 1664lbs @ 39psi per tire so a total of 6656lbs

If your tires are a 100 XL they can be safely run at 42psi and will support 1764lbs but still not enough for the MME

A 245/45/18 96 SL supports 1564lbs @ 39psi per tire so a total of 6256lbs

Yes I understand what you are saying. Dealer put 100XL on, I'm not saying it's right. I appreciate the feedback.

 

[XJRMan]

Calibrate? Heck mine will sometimes read 1mph when I’m still in Park.

I have never seen that, at least its only 1mph off, not 5mph

 

[933233311602]

245/45/18 winter rims and tires from my Jag. If it is GPS, I could try it, I just do not wanna rack up miles on the OD, if you know what I mean?

As others have said, that tire is too out of spec for the Mach E. It's about 93% of the circumference of stock, which is too small.

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