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IMPORTANT INFORMATION
To ensure that your speedometer reads accurately when fitted to your particular vehicle, we will need to calculate the required "revolutions per mile"
For calibration of a new instrument, or re-calibration of an existing instrument, we will need you to provide the following information from your vehicle...
1
1
Take the measurement from the centre of the hub of a drive wheel to the ground (distance measured in inches), with the tyre pumped to normal pressure.
2
Put a chalk mark at the bottom of the measured wheel also marking on the ground where it meets. Push the vehicle forward one revolution of the chalk mark and record the distance travelled (measure in inches).
3
* DO NOT DO THIS BY JACKING UP THE WHEEL AS THIS GIVES COMPLETELY FALSE RESULTS *
Now send us the values that you recorded for Answer(1), Answer(2) and Answer(3) above.
ANSWER:(3)__________ number of turns of the cable. (N.B. include parts of a turn e.g. seven and a quarter turns)
ANSWER:(2) __________ distance in Inches
ANSWER:(1) __________ distance in Inches

 

 

 

 

 

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