User manual

PROGRAM WHEEL SIZE, UNITS

AND CHRONOGRAPH

PROGRAM WHEEL SIZE, UNITS

AND CHRONOGRAPH

ENGLISH

MEASURED WHEEL SIZE

If your wheel/tire size is not one of the pre-programmed sizes, or if you desire

absolute accuracy, you may enter an exact wheel circumference into the

system. Use one of the two following methods for measuring the

circumference of your wheel/tire combination.

MEASURING WHEEL SIZE USING RADIUS METHOD

The wheel radius method is quick, easy and very accurate.

1. With your bike standing vertically on a flat surface, measure the

distance in millimeters from the center of the front axle or quick

release to the floor. If your measurement is in inches, multiply by 25.4

to convert to millimeters.

2. Multiply the measurement in millimeters by 6.28 and enter the

resulting number into your computer using the steps on Page 32.

MEASURING WHEEL SIZE USING ROLLOUT METHOD

The roll-out method is the most accurate method for determining the circumference of your

wheel/tire combination.

1. On a flat open surface make a mark on your tire and the floor exactly where they meet.

2. Roll your bike forward one full revolution of the front wheel and mark the point on the

floor where the revolution is complete. For maximum accuracy be sitting on the bike while

someone rolls you and the bike forward.

3. Measure the distance from the first mark to the second in millimeters and enter the

resulting number into your computer using the steps on Page 32.

CYCLE COMPUTER

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