How fast will I be going at 90 rpm in all combinations of these gears?
| Ring Cog | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | Ring Cog |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 25.6 | 26.3 | 26.9 | 27.5 | 28.2 | 28.8 | 29.4 | 30.1 | 30.7 | 31.3 | 32.0 | 32.7 | 33.3 | 11 |
| 12 | 23.5 | 24.1 | 24.7 | 25.2 | 25.8 | 26.4 | 27.0 | 27.6 | 28.2 | 28.7 | 29.4 | 29.9 | 30.5 | 12 |
| 13 | 21.7 | 22.2 | 22.7 | 23.3 | 23.8 | 24.4 | 24.9 | 25.5 | 26.0 | 26.6 | 27.1 | 27.6 | 28.2 | 13 |
| 14 | 20.1 | 20.6 | 21.1 | 21.6 | 22.1 | 22.6 | 23.2 | 23.7 | 24.2 | 24.7 | 25.1 | 25.6 | 26.1 | 14 |
| 15 | 18.8 | 19.2 | 19.7 | 20.2 | 20.6 | 21.1 | 21.6 | 22.0 | 22.5 | 23.0 | 23.5 | 23.9 | 24.4 | 15 |
| 16 | 17.6 | 18.0 | 18.5 | 18.9 | 19.4 | 19.8 | 20.3 | 20.7 | 21.1 | 21.6 | 22.0 | 22.5 | 22.9 | 16 |
| 17 | 16.6 | 17.0 | 17.4 | 17.8 | 18.2 | 18.7 | 19.1 | 19.4 | 19.9 | 20.3 | 20.7 | 21.1 | 21.6 | 17 |
| 18 | 15.6 | 16.1 | 16.4 | 16.8 | 17.2 | 17.6 | 18.0 | 18.4 | 18.8 | 19.2 | 19.6 | 19.9 | 20.4 | 18 |
| 19 | 14.9 | 15.2 | 15.6 | 15.9 | 16.3 | 16.7 | 17.0 | 17.4 | 17.8 | 18.2 | 18.5 | 18.9 | 19.3 | 19 |
| 20 | 14.1 | 14.4 | 14.8 | 15.1 | 15.5 | 15.8 | 16.2 | 16.6 | 16.9 | 17.3 | 17.6 | 18.0 | 18.3 | 20 |
| 21 | 13.4 | 13.7 | 14.1 | 14.4 | 14.8 | 15.1 | 15.4 | 15.8 | 16.1 | 16.4 | 16.8 | 17.1 | 17.5 | 21 |
Colors group similar values. 20+ is green, 10ish-20, blue, and below 10, red.