tags:: gearing, bikes, stormchaser

- Tour Divide 2025 SingleSpeed
	- two were on 32×18 (51 Gear Inches)
	- two on 34×18 (54 Gear Inches)
	- two on 32×17 (54 Gear Inches)
	- one ran 32×16 (58 Gear Inches)
	- one was spinning a 39×24 (49)
	-
- Created with [bicycle_gear_calculator_withsummary.py](../assets/bicycle_gear_calculator_withsummary_1746460243216_0.py)
- Enter tire width in mm (e.g., 23): 55
  Enter wheel size in mm (e.g., 622 for 700c): 622
  Enter list of chainring teeth, separated by commas (e.g., 34,36,38,40): 36,38
  Enter list of rear cog teeth, separated by commas (e.g., 11,12,13,14,16,18,20,22,25,28,32): 16,18,20
  Enter list of target cadences in RPM, separated by commas (e.g., 80,90,100): 30,60,80,100
  Enter list of target speeds in MPH, separated by commas (e.g., 15,18,20,25): 10,12,15,20,25
- | Chainring | Cog | Ratio | Gear Inches | Cadence at 20mph | Speed at 100rpm |
  | --- | --- | --- | --- | --- | --- |
  | 32 | 16 | 2.00 | 57.6 | 116.6 | 17.1 |
  | 32 | 17 | 1.88 | 54.2 | 123.9 | 16.1 |
  | 32 | 18 | 1.78 | 51.2 | 131.2 | 15.2 |
  | 32 | 19 | 1.68 | 48.5 | 138.5 | 14.4 |
  | 32 | 20 | 1.60 | 46.1 | 145.8 | 13.7 |
  | 32 | 21 | 1.52 | 43.9 | 153.1 | 13.1 |
  | 32 | 22 | 1.45 | 41.9 | 160.4 | 12.5 |
  | 34 | 16 | 2.12 | 61.2 | 109.8 | 18.2 |
  | 34 | 17 | 2.00 | 57.6 | 116.6 | 17.1 |
  | 34 | 18 | 1.89 | 54.4 | 123.5 | 16.2 |
  | 34 | 19 | 1.79 | 51.6 | 130.4 | 15.3 |
  | 34 | 20 | 1.70 | 49.0 | 137.2 | 14.6 |
  | 34 | 21 | 1.62 | 46.7 | 144.1 | 13.9 |
  | 34 | 22 | 1.55 | 44.5 | 150.9 | 13.3 |
  | 26 | 16 | 1.62 | 46.8 | 143.6 | 13.9 |
  | 26 | 17 | 1.53 | 44.1 | 152.5 | 13.1 |
  | 26 | 18 | 1.44 | 41.6 | 161.5 | 12.4 |
  | 26 | 19 | 1.37 | 39.4 | 170.5 | 11.7 |
  | 26 | 20 | 1.30 | 37.5 | 179.4 | 11.1 |
  | 26 | 21 | 1.24 | 35.7 | 188.4 | 10.6 |
  | 26 | 22 | 1.18 | 34.1 | 197.4 | 10.1 |
  | 38 | 16 | 2.38 | 68.4 | 98.2 | 20.4 |
  | 38 | 17 | 2.24 | 64.4 | 104.4 | 19.2 |
  | 38 | 18 | 2.11 | 60.8 | 110.5 | 18.1 |
  | 38 | 19 | 2.00 | 57.6 | 116.6 | 17.1 |
  | 38 | 20 | 1.90 | 54.8 | 122.8 | 16.3 |
  | 38 | 21 | 1.81 | 52.1 | 128.9 | 15.5 |
  | 38 | 22 | 1.73 | 49.8 | 135.1 | 14.8 |