Interactive Gear Chart
Visualize your entire drivetrain range. Compare ratios across the cassette to find duplicates and smooth shifting patterns.
| Cogs ↓ / Rings → | 30t | 32t | 34t | 36t | 39t | 40t | 42t | 44t | 46t | 48t | 50t | 52t | 53t |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10t | 79.2 | 84.5 | 89.8 | 95 | 103 | 105.6 | 110.9 | 116.2 | 121.4 | 126.7 | 132 | 137.3 | 139.9 |
| 11t | 72.1 | 76.8 | 81.6 | 86.3 | 93.7 | 96.1 | 100.8 | 105.6 | 110.4 | 115.1 | 120.1 | 124.9 | 127.2 |
| 12t | 66 | 70.5 | 74.7 | 79.2 | 85.8 | 87.9 | 92.4 | 96.9 | 101.1 | 105.6 | 110.1 | 114.3 | 116.7 |
| 13t | 61 | 64.9 | 69.2 | 73.1 | 79.2 | 81.3 | 85.3 | 89.2 | 93.5 | 97.4 | 101.6 | 105.6 | 107.7 |
| 14t | 56.5 | 60.5 | 64.2 | 67.8 | 73.7 | 75.5 | 79.2 | 82.9 | 86.9 | 90.6 | 94.2 | 97.9 | 100.1 |
| 15t | 52.8 | 56.2 | 59.9 | 63.4 | 68.6 | 70.5 | 73.9 | 77.4 | 81 | 84.5 | 87.9 | 91.6 | 93.2 |
| 16t | 49.6 | 52.8 | 56.2 | 59.4 | 64.4 | 66 | 69.4 | 72.6 | 76 | 79.2 | 82.6 | 85.8 | 87.4 |
| 17t | 46.5 | 49.6 | 52.8 | 56 | 60.5 | 62 | 65.2 | 68.4 | 71.5 | 74.4 | 77.6 | 80.8 | 82.4 |
| 18t | 44.1 | 47 | 49.9 | 52.8 | 57.3 | 58.6 | 61.5 | 64.4 | 67.6 | 70.5 | 73.4 | 76.3 | 77.6 |
| 19t | 41.7 | 44.4 | 47.3 | 49.9 | 54.1 | 55.7 | 58.3 | 61.2 | 63.9 | 66.8 | 69.4 | 72.3 | 73.7 |
| 21t | 37.8 | 40.1 | 42.8 | 45.1 | 49.1 | 50.2 | 52.8 | 55.4 | 57.8 | 60.5 | 62.8 | 65.5 | 66.5 |
| 23t | 34.3 | 36.7 | 39.1 | 41.4 | 44.9 | 45.9 | 48.3 | 50.4 | 52.8 | 55.2 | 57.3 | 59.7 | 60.7 |
| 25t | 31.7 | 33.8 | 35.9 | 38 | 41.2 | 42.2 | 44.4 | 46.5 | 48.6 | 50.7 | 52.8 | 54.9 | 56 |
| 28t | 28.2 | 30.1 | 31.9 | 34.1 | 36.7 | 37.8 | 39.6 | 41.4 | 43.3 | 45.1 | 47.3 | 49.1 | 49.9 |
| 30t | 26.4 | 28.2 | 29.8 | 31.7 | 34.3 | 35.1 | 37 | 38.8 | 40.4 | 42.2 | 44.1 | 45.7 | 46.7 |
| 32t | 24.8 | 26.4 | 28 | 29.8 | 32.2 | 33 | 34.6 | 36.4 | 38 | 39.6 | 41.2 | 43 | 43.8 |
| 34t | 23.2 | 24.8 | 26.4 | 28 | 30.4 | 31.2 | 32.7 | 34.1 | 35.6 | 37.2 | 38.8 | 40.4 | 41.2 |
| 36t | 21.9 | 23.5 | 24.8 | 26.4 | 28.5 | 29.3 | 30.9 | 32.2 | 33.8 | 35.1 | 36.7 | 38 | 38.8 |
| 40t | 19.8 | 21.1 | 22.4 | 23.8 | 25.6 | 26.4 | 27.7 | 29 | 30.4 | 31.7 | 33 | 34.3 | 34.8 |
| 42t | 18.7 | 20.1 | 21.4 | 22.7 | 24.6 | 25.1 | 26.4 | 27.7 | 29 | 30.1 | 31.4 | 32.7 | 33.3 |
| 50t | 15.8 | 16.9 | 18 | 19 | 20.6 | 21.1 | 22.2 | 23.2 | 24.3 | 25.3 | 26.4 | 27.5 | 28 |
| 52t | 15.3 | 16.4 | 17.2 | 18.2 | 19.8 | 20.3 | 21.4 | 22.4 | 23.2 | 24.3 | 25.3 | 26.4 | 26.9 |
How to Analyze Your Gearing Matrix
A gear chart (or gearing table) is the best way to visualize the "gaps" and "overlaps" in your bicycle's drivetrain. While a simple calculator gives you one number, this chart shows you the entire landscape of your shifting options.
Gear Inches vs. Gear Ratio
Use the toggle at the top of the chart to switch modes:
- Gear Ratio: Pure mechanical advantage. Useful for comparing cassette jumps regardless of wheel size.
- Gear Inches: Adjusts for Wheel Size. This is the "real feel" metric. A 50x17 gear on a road bike (26.3" diam) feels harder than a 50x17 on a 20" BMX bike. Gear Inches show this difference.
Identifying Overlapping Gears
If you ride a bike with a front derailleur (2x or 3x), you likely have "overlapping gears." For example, on a standard 50/34 compact crankset:
- 50t Ring / 28t Cog = ~47 Gear Inches
- 34t Ring / 19t Cog = ~47 Gear Inches
These two combinations feel exactly the same. The chart highlights these similarities via color coding. Understanding this helps you avoid "cross-chaining" (running Big-Big or Small-Small) by finding an equivalent gear ratio in a more efficient chainline.
Optimizing Your Cassette
Look at the vertical columns. If the jump in numbers between two rows (cogs) is too large, it means your cadence will drop significantly when you shift.
Racers prefer "tight" cassettes (e.g., 11-12-13-14-15...) to keep their cadence steady. Climbers prefer "wide" cassettes (e.g., 11-13-15-18...) to get a massive bailout gear, sacrificing smooth steps in between.
Next Steps
Once you have mapped out your ratios, check how they translate to speed using our Cadence Calculator.
Chart visualization powered by BikeCalc. Darker purple indicates higher resistance (harder gears).