# Do bike chains stretch?

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## How long should a bike chain last?

Replacing your chain regularly can prolong the life of your drivetrain. Most mechanics agree that you should replace your chain about every 2,000 to 3,000 miles, depending on your riding style. Many Tour De France riders wear out two or even three chains on their primary bike over the course of the three-week race.

## How do you know if your bike chain is too small?

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 often should I change my bike chain?

To avoid this accelerated wear of your cassette and chainrings, a general rule of thumb is to replace your bike’s chain every 2,000 miles. Mind you, this is just a starting point. No two chains will wear at exactly the same rate because no two riders treat their chains the same.

## How much does it cost to replace a bicycle chain?

How much does a bike chain cost to replace? Entry level chains can start off around \$15.00 with more expensive and higher performance chains ranging from \$25.00 to \$60.00 or more. More expensive chains increase shift quality and are generally more durable as they wear.

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## What causes bike chains to stretch?

The major cause of chain “stretch” is wearing away of the metal where the link pin rotates inside of the bushing (or the “bushing” part of the inside plate) as the chain links flex and straighten as the chain goes onto and off of the sprockets.

## How do I know if my roller chain is worn?

How To Measure Chain Stretch

1. Identify chain pitch size.
2. Locate the corresponding step on the gauge.
3. Check gauge for fit between any two roller links. (Do this with chain in tension.)
4. If the gauge step fits through the checkpoint, the chain is worn out and needs to be replaced.