# Quick Answer: Bicycle Chain How Long?

## How long should a bicycle chain be?

Using a ruler, a new chain should measure exactly 12 inches across 12 links, from middle of pin to middle of pin. The number most commonly agreed on for a worn chain is one percent elongation between links.

## How do I know my bike chain size?

Begin by counting the number of teeth on the largest front sprocket and largest rear. These numbers are often printed right on the sprockets and cogs. Next, measure the distance between the middle of the crank bolt to the rear axle. This is also the chain stay length.

## Does length of bike chain matter?

Length Does Matter: Chain length is one of those important setup points that often gets overlooked both when building up a bike from scratch, or when replacing a worn chain. The best case scenario is that your bike will refuse to shift to the larger sized cogs or chain rings due to too much chain tension.

## How do I know if my bike chain is too long?

Do a simple check on your bike by shifting the chain to the big chainring and the biggest cassette cog; then, push on the end of the derailleur cage (pushing forward) to see how much it will move forward. If it moves just a little, then you’re good. If it moves a lot, then you’ve got too much chain.

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## How many links do I need in my bike chain?

Bicycle drive chain length A new bicycle chain usually comes with 116 links. This is long enough for the biggest chainrings and for most distances of rear wheel from front chainrings. So for optimal length a new chain is usually shortened from the 116 links that come in the box.

## How do I know if my chain is too short?

You should also see two slight bends at each jockey wheel of the rear derailleur. 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.

## 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.

## Does length of chain affect speed?

Registered. Sprocket and gear size affect performance (speed/torque) The length of the chain will only effect your wheel base

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## Why does my bike chain slip when I pedal hard?

Most of the time, a skipping chain is caused by cable stretch. In the first half dozen rides on a new bike your shift cables stretch the most. They can also stretch over time as you ride. Hippley explains, “It takes cable tension to open a derailleur, which shifts your chain between gears.

## Should I shorten my bike chain?

You either deliberately run the chain long enough to handle your mistakes in shifting (for big/big) or you don’t. You should have better shifting theoretically with a shorter chain, but if you shift big/big by accident you do have a problem.

## When should I shorten my bike chain?

Most of the time, you will inspect your chain to know whether it needs a replacement. You should count the links from the first pin to the last pin. You must ensure that the gap between the pins corresponds to 12 inches. If it extends to more than 12 ⅛ inches, it is time to replace your bike chain or shorten the chain.