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# What is sprocket diameter?

## What is sprocket diameter?

Number of sprocket teeth or sprocket diameter. . . This dimension measures the diameter of the sprocket plate not including sprocket teeth.

## How do you measure the diameter of a sprocket?

To measure the existing sprocket pitch diameter, wrap the sprocket with the belt and measure the distance at an angle of 180 degrees from rod head to rod head.

What is the diameter of a 40 tooth sprocket?

Specifications

Specification Description
Number of Teeth 36
Pitch 40 Chain
Product Diameter 6.02 in.
Product Height 6.02 in.

What is the diameter of a 38 tooth sprocket?

Dimensions: Inches

Chain Size → #25 #80
Tooth Count ↓ 1/4″ Pitch 1″ Pitch
36 3.008 12.030
37 3.087 12.349
38 3.167 12.668

### What is the diameter of a 60 tooth sprocket?

9.841″
40 Pitch, 60 teeth. 1″ Bore, 9.841″ Outside Diameter.

### What is the pitch of a sprocket?

The teeth of the sprocket contact the surface of the bushings when the chain is wrapped around a sprocket. Pitch is the distance between the centers of two adjacent pins. Common pitches are 0.25”, known as #25, and 0.375” (#35).

What size is a 40 chain?

40 Roller chain made to ANSI b 29.1 is 1/2″ or 12.7 mm pitch. It is available in single strand 40-1 duplex 40-2 and triplex 40-3.

How do you read a 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.

## Is a smaller sprocket faster?

Substituting a larger front or smaller rear sprocket lowers the ratio (sometimes called “taller” gearing), resulting in more speed for a given engine rpm. Likewise, a smaller front or larger rear sprocket gives less speed for a given rpm (“shorter” gearing).

## What is chain pitch?

Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by two. The easiest way to determine the pitch of your chain is to look at the number stamped on the drive link.

What does sprocket size do?

The sprocket sizes determine how many times the countershaft must turn in order to spin the rear wheel. This ratio is your final drive, which is a numerical indication of how many turns the front sprocket makes in relation to the rear.

How to calculate sprocket ratio?

The easiest way to calculate sprocket ratio is to count the number of teeth on both the driving and the driven sprockets and divide the first by the second. This ratio tells you how many times the driven sprocket turns for every revolution of the driving sprocket.

### How do you calculate chain length?

Methods to determine chain length. Method #1: Size to old chain (count links) If your old chain was sized correctly, it can be used to determine the length of your new chain. To check if it was the correct size, shift the bike to the smallest sprockets and check the chain for any slack.