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TRACK RATIOS
For those trackies amongst you I have constructed this chart. It's based on a 23C tyre and a 700mm wheel which is a fairly common combination these days. Just for fun I included the top speed achievable at a cadence of 165rpm
Wheel/tyre
Wheel Diametre (metres)
Chain ring
Rear Sprocket
Roll out distance
Gear in inches
Cadence
Speed kph
700 x 23C
0.674
44
16
5.82
74.3
165
58
45
5.96
75.9
59
46
6.1
77.6
60
47
6.2
79.3
62
48
6.3
81.0
63
49
6.48
82.7
64
50
6.62
84.4
66
51
6.75
86.1
67
52
6.88
87.8
68
15
6.21
79.2
61
6.35
6.49
82.8
6.63
84.6
6.77
86.4
6.92
88.2
7.06
90.0
70
7.2
91.8
71
7.34
93.6
73
Last updated: Tuesday, 05 December 2006
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