Operation Manual

32
ETRTO Wheel size diameter (inches) Wheel size setting (mm)
25-559 26 x 1.0 1884
23-571 650 x 23C 1909
35-559 26 x 1.50 1947
37-622 700 x 35C 1958
52-559 26 x 1.95 2022
20-622 700 x 20C 2051
52-559 26 x 2.0 2054
23-622 700 x 23C 2070
25-622 700 x 25C 2080
28-622 700 x 28 2101
32-622 700 x 32C 2126
42-622 700 x 40C 2189
47-622 700 x 47C 2220
Wheel sizes on the chart are advisory as wheel size depends on the wheel type and air pressure.
Method 2
l Measure the wheel manually for the most accurate result.
l 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 per-
pendicular to the ground. Draw another line on the ground at the valve to mark a full rotation. Measure
the distance between the two lines.
l Subtract 4 mm to account for your weight on the bike to get your wheel circumference.
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