Wheel Size

Enter the bike wheel circumference. Press 8 to close the setting change window. The range is 59 – 98 inches (1500 – 2500 mm).

To Calculate Bike Wheel Circumference

The table below indicates the circumference of some common sizes of bike wheels for standard adult bi- cycles.

Tire Size

Approx.

 

Circumfrence (mm)

 

 

700 X 56

2325

 

 

700 X 50

2293

 

 

700 X 44

2224

 

 

700 X 38

2224

 

 

700 X 35

2168

 

 

700 X 32

2155

 

 

700 X 28

2136

 

 

700 X 25

2105

 

 

700 X 23

2097

 

 

700 X 20

2086

 

 

27 X 1 3/8

2169

 

 

27 X 1 1/4

2161

 

 

27 X 1 1/8

2155

 

 

27 X 1

2145

 

 

26 X 2.125

2070

 

 

26 X 1.9

2055

 

 

26 X 1.5

1985

 

 

26 X 1.25

1953

 

 

26 X 1.0

1913

 

 

26 X 1/650 C

1952

 

 

26 X 1 3/8

2068

 

 

You can also use the “roll-out” method to measure your wheel circumference.

1.Place your front wheel on the ground with the valve stem in the 6 o’clock position.

2.Mark the position of the valve stem on the floor.

3.Roll the bike forward, keeping pressure on the handlebars, until the valve stem is again at the 6 o’clock posi- tion.

4.Mark the position of the valve stem on the floor.

5.Measure the distance between the two marks.

Power Meter

Set up how the Global Trainer™ Bodylink® System Watch calculates and displays power meter zones.

To Configure Power Meter Settings

1. Press MODE until CONFIGURE displays.

29

Page 31
Image 31
Timex W260 To Calculate Bike Wheel Circumference, To Configure Power Meter Settings, Tire Size Approx Circumfrence mm