# FAQ: Why Will A Bicycle Chain Break?

## What causes a bike chain to break?

Mountain bike chains break because of wear and tear, poor maintenance, and gear shifting under a heavy load. Others reasons are because of worn cogs, the chain gets hit, and chain suck. Lastly the teeth of the chainring is bent, not using proper joining pins, and not properly installing the bike chain.

## How often do bicycle chains break?

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 much force does it take to break a bike chain?

Wippermann’s internal standard is 9,500-11,000 Newtons of breaking force for its bicycle chains, and they achieved that; some of the others fell short of that.

## What is chain breaking?

: a brief radio or television commercial given during one of the station-identification intervals in a network program.

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

Most bike shops will charge about \$30 – \$50 dollars depending on the bike shop, whether it’s a popular brand or a “mom & pop” shop. You may also want to take into consideration that the chain itself may cost \$30 – \$50 dollars but then the labor cost to replace this might run you an additional \$10 dollars.

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

Another ballpark method for checking chain wear is by measuring it with a ruler. Pick a rivet and line it up at the zero mark. Count 24 more rivets and your last rivet should be at the 12″ mark of your ruler. If it is off by more than 1/16″ your chain is stretched to the point of replacement.

## 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 much horsepower can a bike chain handle?

Even so, road bike chains are strong enough for very strong riders, and even strong enough for mid drive e-Bike conversions (motor adds to the chain drive force) of 1,000 watts (1.3 horsepower) or more.

## How much tension can a bike chain take?

The chain should be tight enough that it only allows you to move it up and down about half an inch. If there is no slack in the chain then it is too tight. And if there is too much slack then you need to tighten that chain. In this post, we will go through how tight should a bike chain be.

## How much force can a bike frame take?

A frame can stand a single impact providing a force of X, but it may fail after one hundred impacts of smaller force X/1000 (yes, you are reading correct, standing a single impact of force X, but failing after a cumulative impact force of 1/10 of X).