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Originally Posted by SlickHolden
Thats because he privatised the state 
But on speeds what stupid person allows you too get away with speeding at higher speeds more so then lower speeds.
I'd rather a 10% tolerance at 90 below and 5% 100 above. You shouldn't get away with more at higher speeds.
Too anyone that believes there speddo is out have it looked at, One hit in the pocket by your own hand is better then 2 hits on the pocket forced by a speeding fine. |
You really have no idea do you?
The circumference of your tyres is dependent on:
Tread wear (new tyres are bigger)
Temperature of the road
Gas pressure in the tyres (which is also temp dependent)
Load carried
Temperture of the rims
Deformation due to rotational vectors (worse with smaller rims)
Your speedometer calculates indirectly from the number of rotations of your wheel per second.
If the wheel is wider because it has expanded you will travel further per rotation therefore your speedo will read lower.
To be 3% out of tollerence you need less than 0.5% increase in radius.
In the case of a standard falcon wheel with is about 65cm to be 3% out is a difference of about 3mm. How deep is your tread?
Of course those are Ford measurements, I am sure you will tell me that Holden measurements are faster and more accurate.......