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Old 11-29-2021, 12:24 PM   #4 (permalink)
freebeard
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No reference, but from memory rolling resistance is linear and aerodynamic resistance is exponential.

There is a long tail on the lower end, IIRC aerohead has said 25 MPH is where the streamlines begin to order themsleves. At some point (45 MPH?) aero drag exceeds rolling resistance. The situation is complicated by the Reynolds Number and crosswinds.
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