EDT EX-RAY, Руководство пользователя

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Tire Wheel Size Calculation
Calculating Proper Tire Size:
Four methods to set the proper
size which determines speed.
The number needed in the com-
puter is in millimeters.
Method 1) Easy Ruler
Method:
Find the circumference of the
front wheel by measuring its
diameter in millimeters. (An inch
to conversion is available in the
back of this booklet)
Multiply the wheel diameter by
3.14. The result is your tire size.
Example: [ INCH x 25.4 = mm ]
So 21.4” tall x 25.4 = 545mm
545mm x 3.14 = 1706mm
Method 2) Rolling Measurement:
On a flat surface, mark the tire sidewall (with the speed sensor
mounted) and the ground with a marking pen or chalk. Roll the
wheel until the mark on the tire completes 1 revolution and back
on the ground. Mark the ground at this location. (Driver should be
in the car at the time)
Measure the distance between the marks on the ground and
convert the measurement to millimeters (multiply INCH by 25.4 to
get mm). Use this number for your wheel size. For accuracy, the
drivers weight should be on the cart when making this measure-
ment.
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