## What gears for what speed cycling?

Bikes generally have 1, 3, 18, 21, 24, or 27 speeds. (10- and 15-speeds are obsolete and you don’t see them on new bikes anymore.) Lower numbers are the low gears, and higher numbers are the high gears. First gear is a low gear.

### How do you find the gear ratio of 3 gears?

To calculate the gear ratio: Divide the number of driven gear teeth by the number of drive gear teeth. In our example, it’s 28/21 or 4 : 3. This gear ratio shows that the smaller driver gear must turn 1,3 times to get the larger driven gear to make one complete turn.

**How do I figure out what gear ratio I need?**

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).

**How do you calculate gear speed?**

To calculate speed ratio, otherwise known as gear ratio, you divide the number of teeth of the input gear by the number of teeth of the output gear.

## What is a 3-speed bike good for?

A 3-speed bike offers enough versatility to help you navigate through uneven landscapes or rougher terrains without exerting too much energy.

### How do you calculate gearing on a bike?

To calculate the exact gearing, divide the number of chainring teeth by the number of sprocket teeth and multiply the answer by the actual rolling diameter of the tyred wheel. (Divide actual rolling circumference by 3.142 to calculate rolling diameter) We have placed cookies on your browsing device to enable this website to function correctly.

**What determines the pedaling gear of a bicycle?**

Back in the High-Wheeler years from about 1870 to about 1887, the pedaling gear you had was determined by the diameter of the wheel, because the crank was attached to it, so one revolution of one meant one of the other, too.

**How many times does the rear gear go into the front?**

In the ’70s through the mid-’90s when most riders knew about this, the standard multiplier was 27, because a standard racing wheel was around 27-inches in diameter. With any of those combinations, the rear cog goes into the front ring exactly 2 times. Two x 27 = 54. The answer is expressed in inches, so…54-inch gear. First divide 24 by 36.

## Do you use gear inches?

On the surface it’s geeky, but it’s actually helpful or useful or at least interesting. Gear INCHES is the classic American way to figure out whether a 36 front x 28 rear combo is harder or easier than a 40 front x 32 rear. A way to objectively, instantly, compare how hard or easy different gear combinations are.