Performance AXIOM Owner's Manual

Cyclocomputers
Owner's Manual
Determining Wheel Circumference
In order for the Axi om Cyclocomputer to accur
al wheel circumference. There are two methods of determining your wheel circumference: 1) the Tire Size
Chart Method or 2) the Roll Out Method (th
Method 1 - Tire Size Chart Method
Using the chart below, locate the size of tire that you will be using on your front wheel. The wheel circum-
ference (in mm) is shown to the right of the tire size.
Example: for a tire size of 700x25, the corresponding wheel circumference is 2086 mm - 2086 is the number
you need to program into your computer.
Tire Size
20 x 1.75
24 x 1
24 x (Tubular)
26 x (Tubular)
26 x 1
26 x 1.25
26 x 1.5
26 x 1.9
26 x 2.2
26 x 1 3 ⁄
8
Method 2 - Roll Out Method
Stand your bicycle uprigh t. With your tire inflated to its pr
is located at the bottom. Make a mark of the valve's location on the floor. Roll the bicycle one complete
wheel revolution, in a straight line, until the valve is again at the bottom. Mark this new location of the
valve on the corresponding point on the floor. Measure the distance between the marks, in millimeters (mm).
This is the value o f th e wh eel circumference
plied by 25.4 converts inches into mm; i.e. 1 inch = 25.4 mm).
ately compute distance and speed, you must enter your actu-
e Roll Out M eth od gives you a higher degree of accuracy).
Wheel Circumference (mm) Tire Size
1528 27 x
1753 27 x 1
1759 27 x 1
1929 27 x 1
1913 700C (Tubular)
1967 700 x 20
1974 700 x 25
2048 700 x 28
2074 700 x 32
2068 700 x 35
oper pressure, rotate your wh
that you need to pr ogr
Valve Distance (in mm)
Wheel Circumference (mm)
⁄ 2077
5
8
2105
⁄ 2123
1
8
⁄
1 2142
4
2083
2058
2086
2096
2114
2139
eel so that the valve
am in to your computer. (N ote: in
Valve
ches multi-