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About Bike Crank

Table of Contents
  1. Introduction
  2. One half of the chain seems very tight, the other half seems very loose?
  3. My crank arm keeps falling off my bike.

Q. A work friend has given me his son’s BMX to look at, he says its hard to ride.
A. If the crank is tightening during a revolution there could be a problem with the bottom bracket bearings or the axle.

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