Clayton... most of the time when it blows and I get close to 20 m/h I do not find the time to look at the display.
Reseting the unit... I reset trip and max speed every time - but I end up with odd readings for the max speed. But the same thing happens when I take the gps jogging - speeds 2x or 3x the speeds that I would expect.
Terry... what type of mapsource do you use?

Thanks Patrick