285 70r 17 sct tuner rotation question

[CellTechII]

I just put 285's on my 2006 6.0 4x4 crew cab and it had 265's. What is the Rotation per mile setting in the sct xcaliber 2? My mph is off by about 2-3. I don't know what the factory default is so I have no idea where to start. Any info would be greatly appreciated! Thanks

[smokeless]

I think it should be set around 615. I will see if I can find the calculator to post.

[smokeless]

Here you go.

tools and toys (not just for linux): car wheel calculator

[Dave]

The correct setting is 615 revs per mile.

The bad news is that changing that setting will not change your speedometer.

You either have to find someone with Auto enginuity software or take the truck to the dealer to have the speedo adjusted

[CellTechII]

Thanks for the info. I really thought it would change the speedometer. What about the fuel mileage meter? I noticed a pretty big decrease in mileage on the gauge, but not too much at the pump. Thanks again for the info!

[3LDUDE]

I just got my x3 today and where do I change this setting at?

[Davey~do]

Originally Posted by 3LDUDE

I just got my x3 today and where do I change this setting at?

When reprogramming it's under "adjust options" then "revs per mile"

[3LDUDE]

ok thanks for the info