Tag Archives: repair

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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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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Flats photos

John added photos of a frame pump, mini pump and CO2 inflator to flats.html.

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Stuck seatposts

John has added information on yet another way to remove a stuck seatpost — dissolving it using a strong chemical.…

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Flats

John has made a few revisions to Sheldon’s page on flat tires. More to come…

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Repair of Shimano STI Drop-Bar Brake/Shift Levers

These levers no longer index properly when the grease inside gums up — and the internals are very complicated. John Allen has posted an article describing several approaches to repair of these levers, and with a link to an expert … Continue reading

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Harriet Fell’s updates to the site

While John is plugging away at adding new material to the site, I continue to work on cleaning up the code. I had started converting files to XHTML but I am now converting to HTML5 instead. I am trying to … Continue reading

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