Besides your tires, your bike’s chain is arguably the component that needs the most frequent replacing. Wait too long, and your chain will wear out, diminishing your shifting quality and shortening the lifespan of the rest of your drivetrain components.
Below, we explain when and how to replace or repair a bike chain—both at home and during a ride.
When to Replace Your Bike Chain
So how often should you replace your chain? Before answering that question, it helps to understand the process of chain wear. As your chain ages, each link’s internal bushings slowly lengthen. In turn, your now-longer chain puts added pressure on your cassette cogs and chainring teeth, causing them to wear faster. This also hampers shifting quality.
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The 2,000-Mile Rule