Nothing lasts forever. A bike chain is no exception. And when its time is up, you want to be ready with a replacement. Here’s how to tell when that time has come.
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by Tamia Nelson | July 21, 2012
A bicycle chain looks simple, but it’s not. It’s a complex and highly engineered system, comprising plates, pins, rollers, and bushings—some 500-600 individual parts in all. And these parts wear. Pins chafe against bushings. Bushings fret against rollers. Regular cleaning and lubrication can delay the inevitable, but sooner or later every chain succumbs to the patient gnawing of steel against steel. In other words, bike chains “stretch.” The pin-to-pin distance increases over time, and in time the chain rides higher on the sprocket teeth, eventually deforming them.
The result? If neglected for too long, your chain starts to skip blithely over the sprockets without engaging the teeth, leaving you spinning your heels furiously while going nowhere—not a good thing to happen just as you’re accelerating to take advantage of a brief lull in oncoming traffic. And the … Continue reading »