http://dccdpro.com/zcart/index.php?m...ea6683906157c9
It wasn't made for this application, but if you're that concerned about it I'd see what Jeff/Spiider/DCCDPro can do for you.
Quote:
Originally Posted by sierra
The requirements for speedos here are that they must not under read but can be up to 10% over. So most of them read 5% over, right in the middle of the range required.
If it's the same in the US you can add up to 5% on the tyre diameter without worrying but I agree, a GPS will prove the point.
The electronic speedos can be recalibrated with an after market gizmo.
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Exactly. The speedo should read higher than you're actually going, which is why I've never worried about taller tires that much.