Bmx Bike Gear Ratio Calculator
Rollout calculator and gear chart.
Bmx bike gear ratio calculator. If you know their numbers just input them below and we ll calculate it automatically for you. Shows table of all possible chainring sprocket combinations with gear ratio. 44 16 gear ratio with 20x1 75 tire is the most commonly used combination in bmx for exact gear measurement. Colors group similar values.
3 is green 2 3 blue and below 2 red. Ratio of the highest gear of your setup. Classic bmx gearing evolved over the years to be 44 16 which has approximately 55 gear inches. Ratio of the lowest gear of your setup.
Bmx ultra has created a really great rollout calculator that tells you exactly what the distance is covered by 1 full crank rotation based on your tire size and gears. Gear inches wheel diameter in inches number of teeth in front chainring number of teeth in rear sprocket. Bicycle gear ratio chart calculator how to calculate bicycle gear ratio. 44 16 2 75 x 19 5 53 625 gear inches 20x1 75 tire.
I ll calculate the best chainring cog combinations and skid patches for your speed and cadence and what your speed will be at various cadences. Chainring size cog size x wheel size. The number is derived from a simple formula. Here is a handy tool for calculating your gear ratio.
The most popular gear ratios are pretty close to a 55 inch which just seems to feel best for most people. Divide front gear by rear gear and multiply by tire diameter example. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm.