I’ve filled out and Harriet has formatted Sheldon’s page about upgrading old road bikes, which Sheldon left as a work in progress.
Tag: repair
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 its ratios carries an important lesson. In connection with that article, John has updated his article about the history of the Elan, his main page about Sachs/SRAM hubs and the internal-gear calculator.
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.
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 one axle unit that works from two or more which do not. Reader Keith Lang has provided instructions in two PDF files. You may go to John’s introduction with links to those files..
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.
Flats photos
John added photos of a frame pump, mini pump and CO2 inflator to flats.html.
Stuck seatposts
John has added information on yet another way to remove a stuck seatpost — dissolving it using a strong chemical.…
Flats
John has made a few revisions to Sheldon’s page on flat tires. More to come…
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 in rebuilding them.
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 give the pages a more uniform layout for easier maintenance and I try to repair the syntax and check on broken links as I work on the files. Someday, I may get to the end of this task and start writing but I fear it shall all be like “Albert’s Bridge” by Tom Stoppard. When I get to the end, it will be time to start again.
