Quote:
Originally Posted by Rokeby
It takes 3-5K miles to "wear-in" a new set of tires.
This can mean +2-3 MPGs.
Is it possible that new tires would also affect roll-down test speeds?
Could there also be contributions from tightish wheel bearings, etc?
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That was my first thought: tire toe-in, tighter bearings and fresher lubricants all around.