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Old 22-01-09, 14:33
deiaccord deiaccord is offline
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Quote:
Originally Posted by josephau View Post
Please educate me. Why would a GPS speedo reading be necessarily more correct than an OEM speedo reading? The former is being read off from a satellite which is thousands of miles above where the bike is. From what I've read so far, it seems to me that there is a general assumption the GPS reading is more accurate than the OEM's, why?
If GPS was inaccurate it would be no good for telling you where you are

The satalites may be a long way a way but by triangulalting the distance from up to 6-7 satalites at one time a gps unit can give you a pretty good indication of your actual land speed which is going to be quite accurate.

An oem speedo may not be necessarily inaccurate but are usually made to show a higher speed than is actually done in an effort to keep actual speeds within legal limits (as most people seem to speed by just a few mph)