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Gearing Table
Fv B> 16 17 18 19 20 21 22 24 26 28
28 1.75 1.65 1.56 1.47 1.40 1.33 1.27 1.17 1.08 1.00
29 1.81 1.71 1.61 1.53 1.45 1.38 1.32 1.21 1.12 1.04
30 1.88 1.76 1.67 1.58 1.50 1.43 1.36 1.25 1.15 1.07
31 1.94 1.82 1.72 1.63 1.55 1.48 1.41 1.29 1.19 1.11
32 2.00 1.88 1.78 1.68 1.60 1.52 1.45 1.33 1.23 1.14
33 2.06 1.94 1.83 1.74 1.65 1.57 1.50 1.38 1.27 1.18
34 2.13 2.00 1.89 1.79 1.70 1.62 1.55 1.42 1.31 1.21
35 2.19 2.06 1.94 1.84 1.75 1.67 1.59 1.46 1.35 1.25
36 2.25 2.12 2.00 1.89 1.80 1.71 1.64 1.50 1.38 1.29
37 2.31 2.18 2.06 1.95 1.85 1.76 1.68 1.54 1.42 1.32
38 2.38 2.24 2.11 2.00 1.90 1.81 1.73 1.58 1.46 1.36
40 2.50 2.35 2.22 2.11 2.00 1.90 1.82 1.67 1.54 1.43
41 2.56 2.41 2.28 2.16 2.05 1.95 1.86 1.71 1.58 1.46
42 2.63 2.47 2.33 2.21 2.10 2.00 1.91 1.75 1.62 1.50
43 2.69 2.53 2.39 2.26 2.15 2.05 1.95 1.79 1.65 1.54
44 2.75 2.59 2.44 2.32 2.20 2.10 2.00 1.83 1.69 1.57
45 2.81 2.65 2.50 2.37 2.25 2.14 2.05 1.88 1.73 1.61
46 2.88 2.71 2.56 2.42 2.30 2.19 2.09 1.92 1.77 1.64
47 2.94 2.76 2.61 2.47 2.35 2.24 2.14 1.96 1.81 1.68
48 3.00 2.82 2.67 2.53 2.40 2.29 2.18 2.00 1.85 1.71
49 3.06 2.88 2.72 2.58 2.45 2.33 2.23 2.04 1.88 1.75
50 3.13 2.94 2.78 2.63 2.50 2.38 2.27 2.08 1.92 1.79
51 3.19 3.00 2.83 2.68 2.55 2.43 2.32 2.13 1.96 1.82
52 3.25 3.06 2.89 2.74 2.60 2.48 2.36 2.17 2.00 1.86

The figures in bold represent the combinations I have seen. However an 18 tooth rear is by far the most common. The blue ones are what I use.
Note these figures do not consider tyre size. If you are comparing wheel sizes multiply the figures by the wheel circumference.

Andy Mittell Practicing

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