How to Remove the Sprocket From a Sturmey Archer Hub

Written by brandon getty
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Sturmey Archer is best known for its three-speed internal-gear hubs. These hubs allow you the versatility required to climb moderate hills without the derailleur mechanism and sprocket cluster that accompany most road bicycles. Because three-speed hubs typically come with only one sprocket, it tends to wear out faster than several sprockets in a cluster. Depending on your experience and preference, you may wish to swap out a sprocket for one of a different size.

Skill level:
Moderate

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Things you need

  • Spanner wrench
  • Thin flathead screwdriver
  • Hammer
  • Punch tool

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Instructions

  1. 1

    Remove the rear wheel from your bicycle by loosening the nuts with a spanner wrench. If your real wheel has a quick-release, you can remove the wheel with your hands. Take the chain off the sprocket and let it hang in the rear triangle of the bicycle.

  2. 2

    Place the wheel on its side with the sprocket facing upward. Take a careful look at the mechanism and locate the spring circlip. This is the snap ring that holds the sprocket in place on the hub.

  3. 3

    Fit the flathead screwdriver into the circlip's groove. Use leverage to pry up the ring a bit at a time, gradually moving around the outside groove. Set the circlip aside.

  4. 4

    Remove the sprocket. Once the circlip has been removed, the sprocket should come off freely.

  5. 5

    Replace the old sprocket. Make sure that the circlip is snapped back into place and made snug by tapping it lightly with a hammer and punch tool.

  6. 6

    Replace the wheel. Thread the chain over the new sprocket, clean up and take a test ride. Make any necessary adjustments.

Tips and warnings

  • Adding a bit of lubricating oil to the sprocket and circlip will make this process easier if the bicycle is old.
  • Make sure that the circlip is seated correctly and snug against the new sprocket before putting your wheel back on. A loose circlip may cause the sprocket and hub to fail.

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