Esoteric info for Sturmey freaks

The first seven of the following files provide amazingly detailed information on Sturmey-Archer hubs, from the earliest models to the present day. They were compiled by English engineer and hub gear enthusiast, the late Jim Gill. Although some of the material was originally published by Sturmey-Archer, the vast majority is Jim’s own work and has never been published before.

Also provided is John Fairbrother’s simpler approach to fixed-wheel conversions. John is an engineer and bicycle restorer based in Hampshire, England.

The files are in Adobe Acrobat format, making them zoomable and easily printable, page at a time.

Epicyclic Gears – some theoretical considerations
Engineer and hub gear enthusiast Jim Gill explains how various hub gears work. Includes zoomable diagrams.
21 pages

Sturmey-Archer Hubs – reference tables
Zoomable dimensioned drawings and tables of pawls, drivers, axle keys, pinion pins, gear teeth, ballcups, hub shell dimensions, indicators and more.
14 pages

Sturmey-Archer Hubs – axle charts
Zoomable dimensioned drawings of axles for Sturmey-Archer hubs.
26 pages

Sturmey-Archer Hubs – cone charts
Zoomable dimensioned drawings of cones for Sturmey-Archer hubs.
7 pages

Sturmey-Archer Hubs – spring charts
Zoomable dimensioned drawings of springs for Sturmey-Archer hubs.
5 pages

Sturmey-Archer Hubs – triggers
Zoomable dimensioned drawings of triggers for Sturmey-Archer hubs. Includes how to convert triggers for use with fixed-wheel hubs.
5 pages

Jim Gill’s fixed hub conversions
Jim Gill’s compilation of how to convert a 3-speed to 2-speed fixed-wheel and how to convert 4-speeds to 3-speed fixed.
8 pages

Jim Fairbrother’s fixed hub conversions
Modifications to Sturmey-Archer hub gears to produce fixed wheel gears
Engineer John Fairbrother outlines another approach to fixed-wheel conversions.
2 pages

Fixed hub trigger conversion
Modifications to Sturmey-Archer triggers for use with fixed wheel gears

More good stuff from Jim Gill.
2 pages

9 thoughts on “Esoteric info for Sturmey freaks”

  1. Dear Mr. Hadland, I am the proud owner of a 1960’s Raleigh Suprbe It has 4 speed Dynohub. I have found plenty of info on the 3 speed, 5 speed and 6 speed dynohubs, but little on the 4 speed. Can you help please?
    I have learned much from your articles and blogs, but I am at a loss with the 4speed, so I really need your help.
    George Drury.

  2. Amazing site, somewhat overwhelming! I wish to fit an AW to a mountain bike frame (135mm dropout). What hub/axle length do I need? I expect the info’s in there somewhere, I know not where, however. Sorry to be a nuisance. Thanks, Steven.

    1. Hi Steven,
      Thanks for the kind words and no need to apologise at all. The AW is no longer made (you can download the currect catalogue here: However, it was listed as recently as 2014-15 and, in the catalogue for that year, two axle lengths were offered. However, the longest is only 175mm, which is for an over-locknut dimension of 127mm, a long way off the 135mm you seek.
      You might nonethless like to have a look at the F30 hub in the current catalogue. That is a 3-speed made specifically for 135mm dropouts and has an integral freehub to take a standard 8- or 9-speed derailleur sprocket cluster, thus giving 24 or 27 speeds. You could always omit the sprockets and use the F30 as a simple 3-speed, should you wish.
      Hope that helps!

  3. Thanks for sharing this incredible knoledge! Information on this hubs is not easy to find and more in this specific form!

  4. Dear MR Hadland, Thank you sincerely for a fantastic resource, you have made my day. Especially considering the information is a technical insight to compliment your worthy book,I have recently purchased. Raleigh: Past and presence of an iconic bicycle brand. The only one in Waterstones. Lucky me, I salute you

  5. Cracking good blog, sir. I am absolutely over the moon about finding it! I live on an extraordinarily hilly island and i find the 3 speed hub the ideal solution for trips to and from the ferry dock. It also allows for a splendid tear drop shape of the chain which i find aesthetically appealing.

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