Wheel Circumference Measurement - Echowell a3 Manual

WHEEL CIRCUMFERENCE MEASUREMENT

Precise Measurement
Roll the wheel until the valve stem is at lowest point to the
ground. Then mark this first point on the ground. Get on
the bicycle and have a helper push you until the valve stem
returns to lowest point. Mark the second point on the
ground. Measure the distance between the marks. Enter
this value to set the wheel circumference.
SPECIFICATIONS
POPULAR TIRES CIRCUMFERENCE REFERENCE TABLE
Tire Size Circumference Number Tire Size
18 Inch 1436 mm
20 Inch 1596
22 Inch 1759
24x1.75 1888
24 Inch 1916
24x 1 3/8 1942
26x1.40 1995
26x1.50 2030
26x1.75 2045
26x1.95
2099
26x2.1 2133
Quick Table : Get a suitable circumference value from the table.
EN 25
Circumference Number
700C 2117 mm
Tubular
700x20C 2092
700x23C 2112
700x25C 2124
700x28C 2136
700x32C 2155
700x35C 2164
700x38C 2174
27.5 Inch 2193
28 Inch 2234
(700B)
28.6 Inch 2281