Tag Archives: internal

Updates to Sturmey-Archer 4, 5 and 7-speed hub page

Major updates to the page on Sturmey-Archer 4, 5 and 7-speed hubs, mostly concerning the hubs sold from 1991 through 2009.

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More troubleshooting advice on Sachs/SRAM internal-gear hubs

There’s more troubleshooting advice now in our article about Sachs/SRAM internal-gear hubs: how to test whether a problem is inside the hub, or only in the shifter and cable — for hubs with 3, 5 or 7 speeds, with pullchain(s) … Continue reading

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Upgrading old road bikes

I’ve filled out and Harriet has formatted Sheldon’s page about upgrading old road bikes, which Sheldon left as a work in progress.

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Sachs Elan/SRAM E12 Internals

John has posted a new article about the mechanism of the Sachs Elan/SRAM E12 12-speed internal-gear hub; the largest, heaviest, most complicated internal-gear hub ever marketed — flawed execution of a brilliant design concept. The unusual way this hub establishes … Continue reading

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More about Sachs/SRAM hubs

John has prepared a new page about the Sachs Orbit hybrid-gear hub and added information about this hub to internal-gears.html and sachs-internal.html; also links to Karsten Stielow’s very interesting Web pages about Sachs and SRAM hubs.

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Shimano Internal-Gear Hubs

John has made major updates to the pages on Shimano Nexus and Alfine internal-gear hubs — 3-speed, 7-speed and 8-speed; also a page with general mechanical information.

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Assembly of Shimano 7-speed Hub Axle Unit

Shimano’s service instructions for the Nexus 7-speed internal-gear hub assume that you will replace the entire axle unit. Taking disassembly past the point where instructions are available is all too easy. You might also want to cannibalize parts to assemble … Continue reading

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Internal gear theory

John has posted his article on internal-gear hub theory, history and some practical advice. This article describes the internal workings of all the newest hubs including those with compound and multi-stage gearing.

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