Bmx Bike Gear Ratio Chart

Chainring size divided by cog size multiplied by wheel size. 44 16 2 75 x 19 5 53 625 gear inches 20x1 75 tire. Try going one tooth lower in front unless your gearing is waaay hard then you could try either going up 1 tooth in back or down 2 to 3 teeth in front.

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The standard for bmx bikes for many years was 44 16.

Bmx bike gear ratio chart. 44 16 gear ratio with 20x1 75 tire is the most commonly used combination in bmx. Chainring size cog size x wheel size. A typical gear ratio for a 20 bmx bike is 2 75 1. The most popular gear ratios are pretty close to a 55 inch which just seems to feel best for most people.

Bmx bicycle racing gear charts basically if you are getting bad starts and aren t spinning the gear out 3 4 way down the first straight then the gearing is too hard. This means that the front sprocket is 2 75 times larger than the rear sprocket or that the rear wheel will make 2 75 rotation for every full rotation of the cranks. Classic bmx gearing evolved over the years to be 44 16 which has approximately 55 gear inches. Mathematically 16 times 2 75 is 44 and 44 divided by 2 75 is 16.

Divide front gear by rear gear and multiply by tire diameter. Bmx gear charts. In the charts below i ve bolded the most common combo s. For exact gear measurement.

The most popular gear ratios are pretty close to a 55 inch which just seems to feel best for most people. 20 x 1 1 8 wheels with 20 x 1 tires 19 375 inflated diameter gear. Most pro bmxers run approximately 54 gear inches. Classic bmx gearing evolved over the years to be 44 16 which has 55 gear inches.

The number is derived from a simple formula. The number is derived from a simple formula.