Service & Maintenance

How do I remove and replace the sprocket?

The process of sprocket removal is the same on all 1, 2, 3, and 6 speed Sturmey Archer hubs.

Multiple sprockets, spacers, and different sized sprockets are differences you expect to see in different hub versions.

This task should be performed in a workshop environment and wearing eye protection.

To remove:

  • It is not necessary to remove the tyre but you should avoid getting cleaning solvents on the tyre surface.
  • If excessively dirty, wipe clean or degrease the sprocket area.
  • Using Circlip pliers or an old flat screwdriver. Hook off the spring clip located in the center of the sprocket.
  • Remove all sprockets and spacers noting their order. All components slide off the splines.
  • Many models have a plastic spoke protector which may be a tighter fit but will also slide off.
  • Clean and degrease all components and the hub body. Avoid getting solvents inside the hub mechanism or bearings.
  • Once clean please note the groove that the C-clip spring sits in. 

To refit:

N.B If you are reusing old components, install in reverse order. If installing new components, use the old parts order as a guide.

  • Additional guides are supplied with sprocket sets.
  • For 3 speed systems, the hub body has 3 splines. The sprocket can be lined up with any spline.
  • For 1, 2, and 6 speed systems, the hub body is based on a Shimano design and one spline is wider than the others. Line up the corresponding wider tab on the sprocket with this wider spline.
  • Refit the spring clip ensuring that it is fully seated into the groove on the hub body.
  • Once the spring clip is correctly seated, there may still be slight movement in the sprockets. This is normal.

 

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