Thanks for the link to that PDF. Here are some photos of my back end.
1. Does this look like normal clearance between chain and frame to you?
2. It's a bit rusty, as you can see!
3. Driveside.
4. Non-driveside. I removed a 1 1/2mm spacer from between the two locknuts. And contrary to my supposition above, the exploded view below suggests that the hub originally included a spacer.
5. The protrusion of the axle is now asymmetrical. This lends further creedence to the theory that a spacer was there when it left the factory.
6. Cogs removed.
7. The pertinent page of the spares catalogue via your link. I'm quite sure now that the spacer I removed is FH-RE016T. Which begs the question, then: why was my chain rubbing against the frame in the first place?
