# How To Length Bicycle Chain?

## How long of a chain do I need for my bike?

If your bike is equipped with the derailleur, you need a 3/32″ or 11/128″ chain. If you have a single-speed or internally geared bike, you need either 1/8″ or 3/32″. You should get the correct size, but if it is not possible, you can get the 1/8″ because it has limited compatibility with the 3/32″ sprocket.

## What happens if bike chain too short?

If the chain is too short, this shift is difficult to make and the derailleur cage is stretched out and almost parallel to the chainstay. If the chain is really short, then you might not even be able to shift into the largest cog. Before you remove the chain, make sure it’s on the small chainring and smallest cog.

## What is the difference between bicycle chains?

Chains can vary in side plate shape, sizing, and height. Differences can cause variations in shifting performance between brands and models. Additionally, chains will vary in the quality of steel used. Better chains that are more durable and longer lasting tend to have harder rivets.

## What is the chain length?

The chain is a unit of length equal to 66 feet (22 yards). There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long.

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## When should I replace my bike chain?

Anything at or beyond the 0.75 percent reading means that you should change your chain immediately. If you are using a chain designed for ten or fewer gears, replace your chain as it nears the 0.75 percent mark. If you are using an eleven or twelve speed chain, replace your chain once it has reached 0.5 percent wear.

## How do I know what speed my bike is?

Multiply the front gear number by the rear gear number to get the number of speeds. For example, if you have two front gears and five back gears, you have a 10-speed bike. If you have one front gear and three back gears, you have a 3-speed bike.

## How do I set the size of a chain link?

Chain Link Sizes: How to Measure Chain Link Sizes

1. Pitch is measured by finding the distance from the center of one pin to the center of the next pin in line.
2. Determine your side plate height and thickness by measuring both inside and outside the roller chain to ensure that you’re seeing a good average size.

## How do I know if my bicycle chain is too loose?

Check your chain out. It should be tight enough that it only allows you to move it up and down about one inch. If it is sagging or much looser than that, you need to tighten that chain up. Chains often loosen when a bike does not have a derailleur.

## Should I shorten my chain?

1 Answer. ” Never run with a chain that is too short, except in an emergency.” (from Sheldon Brown’s Derailleur Adjustment page). If a short chain ends up on the big chainring and big sprocket at the same time, then the derailleur will probably get damaged.