Yes, the speedos do lie.... I hae a Garmin 2730, works pretty well... It does readouts in the 10ths...There's at least 5 or 6 (sometimes 10) satellites sneding signals for the SGPS to do triangulations for speed...That's good enuf for me... my Speedy shows 4mph faster, the Harley, FJR1300 and the Jeep all are about 1/2 mph fast... good enuf for me.
I love my GPS....Unlike me, it doesnt' get lost! <BG>
Mary