# FAQ: How To Determine Proper Chain Length For Replacing A Bicycle Chain?

## 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.

## 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.

## What replacement chain do I need for my bike?

A reading of 0.5 to 0.75 means you should replace your chain. A reading of 0.75 or higher means you not only need to replace your chain, but you should also check the condition of your cassette and chainrings to see if the stretched chain has caused excessive wear to these parts.

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

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.

## Why does my 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.

## What do you do if you cut your bike chain too short?

Registered. To make the chain the correct length, cut one link off the left-over piece of chain that you’ve cut off, buy a second (preferably rivet type) master link, fit them both to the “short” cut chain, and then fit that to the bike using the master link that came with the chain.

## How do you calculate chain length?

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.

## How often should I lube my bike chain?

Bicycle Tutor recommends cleaning and lubricating your bike’s drive chain at least once every month to maintain optimal performance and protection. The chain and drivetrain are typically the dirtiest parts of your bike, and this dirt is bad news for bike longevity and performance.

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## How many miles does a bike chain last?

Expect between 1,500 and 3,000 miles from a 10-speed chain. It helps to establish what counts as ‘worn out’. A chain is worn enough to affect transmission efficiency when it lengthens by 0.75% but has some life left if extended mileage is the aim, in which case it should ideally be replaced when it lengthens by 1%.

## How do you measure anchor chain link?

So how do you measure your anchor chain size? Anchor chain is measured in two primary ways – thickness of the metal in the link, and the length of the link. The most precise method is to use Vernier calipers, though with care a measuring tape can get a close enough estimate.

## What is the length of a chain link?

Common heights include 3 ft, 3 ft 6 in, 4 ft, 5 ft, 6 ft, 7 ft, 8 ft, 10 ft, and 12 ft, though almost any height is possible. Common mesh gauges are 9, 11, and 11.5. Mesh length can also vary based on need, with the standard diamond size being 2″.

## What size is standard bicycle chain?

Chains come in 3⁄32 in (2.4 mm), 1⁄8 in (3.2 mm), 5⁄32 in (4.0 mm), or 3⁄16 in (4.8 mm) roller widths, the internal width between the inner plates. 1⁄8 in (3.2 mm) chains are typically used on bikes with a single rear sprocket: those with coaster brakes, hub gears, fixed gears such as track bicycles, or BMX bikes.