11
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is
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• Use the formula
C = 3.14 × diameter
to
calculate the circumference of the wheel.
• One method of measuring the circumference:
Make a mark on the tyre and on the ground
where the tyre makes contact.Roll the cycle/
wheel forwards until the mark on the tyre
is once again at the contact point with
the ground. The wheel has now travelled
through one revolution. Mark the second
point on the ground and measure
the distance between the two marks to get
the circumference of the wheel.
Wheel
Circum-
diameter
ference of
wheel (mm)
------------------------------------
20
″
1596
22
″
1759
24
″
1916
26
″
(650A) 2073
26.5
″
(Tubular) 2117
26.8
″
(700x25C) 2124
26.8
″
(700x28C) 2136
27
″
(700x32 C) 2155
28
″
(700B) 2237
(w/tire)
Wheel
Circum-
diameter
ference of
wheel (mm)
--------------------------------------
ATB 24
″
x1.75 1888
ATB 26
″
x1.4 1995
ATB 26
″
x1.5 2030
ATB 26
″
x1.75 2045
ATB 26
″
x2 (650B) 2099
27
″
x1
2136
27
″
x1 1/4
2155
Содержание 401-KS20TUL
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