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Great Egret Media - Bicycle Gear Inches Chart
Wheel Chainring Cog
Rim Size min:
Tire Size: max:
Gear Inches for this wheel in these gears
 Ring Cog  32 Ring   Cog
11 79.97 11
12 73.37 12
13 67.60 13
14 62.93 14
15 58.53 15
16 54.96 16
17 51.66 17
18 48.91 18
19 46.17 19
20 43.97 20
21 41.77 21
22 39.85 22
23 38.20 23
24 36.55 24
25 35.17 25
26 33.80 26
27 32.70 27
28 31.33 28
29 30.23 29
30 29.40 30
31 28.30 31
32 27.48 32
33 26.66 33
34 25.83 34
35 25.01 35
36 24.46 36
37 23.63 37
38 23.08 38
39 22.53 39
40 21.98 40
41 21.43 41
42 20.89 42
43 20.34 43
44 20.06 44
45 19.51 45
46 19.24 46
Colors group similar values. 80+ is green, 50ish-80, blue, and below 50, red.