18 inch 3.0 wheels.

I found (according to the GPS) that with the factory size I was 6klm out.
When the speedo read 100klm GPS told me I was only doing 94klm.

Now I'm only 1klm out, speedo reads 100klm and GPS reads 99klm.

So I'm still happy, it has corrected the speedo and still gives me 1klm grace.

FYI for those who could not be bothered reading back.

I went from factory 255/55/19 to 265/65/18

Note that your odometer is now understated.

Quote:

---

Originally Posted by Graeme

Note that your odometer is now understated.

---

So odometer will now be reading about 5% less than actual km travelled, if speedo is approx accurate?

Yes, and needs to be taken into account if calculating fuel consumption.

Quote:

---

Originally Posted by rar110

So odometer will now be reading about 5% less than actual km travelled, if speedo is approx accurate?

---

Good for when you sell I suppose.:wasntme:

Martin