Stock 18" wheel, odometer recaliberate?

[TprGTO-[Robo Fuzz]]

I was wondering if when someone ordered the optional 18" wheel, did the factory recaliberate the new tire diameter into the PCM so the mileage would not be off over time? I figure over time the miles on the odometer would be different of someone was running with 17's than someone running with 18's.

[trbo_blu]

Who cares....you avitar is amazing!



Thats a good question. Staying tuned in for an answer...

[GTPprix]

No, thats actually done in the cluster.

[smyla]

The tire size is different for the 17's v. the 18's. The outside rolling diameter is almost exactly the same so no "recalibration" is necessary. It's well within specs.

Update: The 18's circumference is .8" longer. So your speedo will be running about 1% off. I think factory specs on speedo’s are +- 3%

[TprGTO-[Robo Fuzz]]

I think factory specs on speedo’s are +- 3%
That is correct. GTPprix advised me of that when he was activating the shift light for me. Chris corrected that problem.