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Old 30-12-2013, 10:18 PM
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mithrandir (Andrew)
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Join Date: Jan 2009
Location: Glenhaven
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Quote:
Originally Posted by rogerco View Post
So the odometer says 5.2 when I pass the 5 kilometre sign post on the highway (tested it on two sections) so this means that when my speedo says 104 kph I am actually doing 100kph right?

Can anyone confirm this or is it the other way round?
Roger, depending on how the speedometer and odometer work it might be correct. If the system is fully digital then it should be. If it is mechanical then all bets are off. You might find the ratios change non-linearly with your speed.
If you have a GPS and a straight road to test on you will get a better comparison.
Always remember that your true speed changes with the rolling diameter of the tyres. The more you pump them up the faster you are traveling for the same indicated speed.
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