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ETRTO
25-559
23-571
35-559
37-622
52-559
20-622
52-559
23-622
25-622
28-622
32-622
42-622
47-622
Wheel sizes on the chart are advisory as wheel size depends on the wheel type and air pressure.
Method 2
•
Measure the wheel manually for the most accurate result.
•
Use the valve to mark the point where the wheel touches the ground. Draw a line on the ground to
mark that point. Move your bike forward on a flat surface for one complete rotation. The tire should
be perpendicular to the ground. Draw another line on the ground at the valve to mark a full rotation.
Measure the distance between the two lines.
•
Subtract 4 mm to account for your weight on the bike to get your wheel circumference.
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The most practical way of measuring your cycling session is with our advanced wireless cadence sensor.
It measures your real-time, average and maximum cycling cadence as revolutions per minute so you can
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Wheel size diameter (inches)
26 x 1.0
650 x 23C
26 x 1.50
700 x 35C
26 x 1.95
700 x 20C
26 x 2.0
700 x 23C
700 x 25C
700 x 28
700 x 32C
700 x 40C
700 x 47C
33
Wheel size setting (mm)
1884
1909
1947
1958
2022
2051
2054
2070
2080
2101
2126
2189
2220
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