# How do you calculate sprocket ratio?

## How do you calculate sprocket ratio?

Calculating the Sprocket Ratio The sprocket ratio is simply the number of teeth on the driving sprocket (T1) divided by the number of teeth on the driven sprocket (T2). If the front sprocket on a bicycle has 20 teeth and the rear sprocket has 80, the sprocket ratio is 20/80 = 1/4 = 1:4 or simply 4.

## What is the final drive ratio?

The final drive ratio is the last bit of gearing between your transmission and the driven wheels. In general, a lower final drive ratio will lead to less torque at the wheels but a higher top speed. Meanwhile, a higher ratio will result in the opposite, i.e. more torque at the wheels but a lower top speed.

How do you calculate final drive ratio?

The straightforward way to calculate the Final Drive Ratio is to divide the number of teeth on the ring gear by the number of teeth on the pinion gear. For example, if the ring gear has 30 teeth and the pinion has 10, take the number 30 and divide by 10 to get the ratio of 3:1.

What sprocket is best for wheelies?

If your wanting to do long street wheelies, then a smaller 14t front sprocket and a little clutch dump will do the trick. IMHO , stunting slower stuff with bigger sprockets are A LOT safer than faster wheelies.

### How do you calculate gear ratios?

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 figure out a ratio?

How to calculate a ratio

1. Determine the purpose of the ratio. You should start by identifying what you want your ratio to show.
2. Set up your formula. Ratios compare two numbers, usually by dividing them.
3. Solve the equation. Divide data A by data B to find your ratio.
4. Multiply by 100 if you want a percentage.

Does a bigger sprocket make wheelies easier?

Definitely can pump up some easier wheelies with sprocket change.

What will a bigger sprocket do?

Installing a larger countershaft sprocket creates higher gearing, while a larger rear sprocket lowers gearing. Similarly, a smaller front sprocket lowers the gearing while a smaller rear sprocket makes gearing higher. For taller gearing, a one-tooth-larger countershaft sprocket is often the best bet.

#### How to calculate your sprocket’s final drive ratio?

Gearing Up. To determine the final drive ratio, divide the rear sprocket size, say 49 teeth, by the front or countershaft sprocket size, say 13 teeth (like a new Yamaha YZ250F ). In this case, the Final Drive Ratio is 3.77 – the front sprocket revolves 3.77 times to make one complete revolution of the rear sprocket.

#### How to calculate the final drive ratio of a chainwheel?

Sprockets, or “chainwheels” more literally, are measured by their number of teeth. To determine the final drive ratio, divide the rear sprocket size, say 49 teeth, by the front or countershaft sprocket size, say 13 teeth (like a new Yamaha YZ250F ).

What is the ratio of teeth in a sprocket?

A sprocket ratio is a simple ratio of the number of teeth in the driving sprocket divided by the teeth in the driven sprocket.

What does the RPM on the front sprocket mean?

This figure represents the number of times the front sprocket has to rotate to turn the rear sprocket, and ultimately, it determines how engine rpm translates to road speed and how much torque there is at the rear wheel. Before we get into the nuts and bolts of it, let’s talk the lingo.