Timex W260 manual To Calculate Bike Wheel Circumference, To Configure Power Meter Settings

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.

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