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.
Tag: gears
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.
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.
Sun Tour components
John has done a major update and expansion of Sheldon’s article on Sun Tour components.
Page updates
John has updated chains.html, with some added thoughts about chain cleaning, and more pictures; also leather.html, with a couple of comments from readers about leather treatments; k7.html and k8.shtml to reflect changes in product availability.
John Allen’s updates to the site 12/2010-3/2011
March 13-22-25
headsets.html – major updates including instructions on adjustment of threaded headsets; added exploded diagrams; resized photos and added a photo of a “brinelled” bearing race. More to come — photos of disassembly/reassembly.
March 12
velos.html — added comments in favor of the Peugeot UO-8 frame.
March 11
tooltips/cartridge.html — added information about Velo Orange French-threaded bottom bracket.
February 18
raleigh26.html Minor update (fixed formatting of a list, and one spelling error)
home-drop.html — noted unavailability of commercial drop bolts, pointed to my own implementation, ran a spell check.
January 1
saddles.html — added information on saddle width. tire pressure and width, and suspension seatposts.
December 28
gears/index.html, gears/internal.html, braquets/index.html — I put the new Sturmey-Archer S2 into the calculators. SA used the same model number for a different hub in 1966.
December 27
deakins/lowgears.html
December 26
speeds.html — added information about SRAM 10-speed systems
k7.html — added information on 9 of 10 on 7
k7-7.shtml — updated to indicate cassettes now no longer available
gearing/index.html — added links to more pages about gearing
December 25
seatpost-sizes.html and seatpost-sizes-m-z.html,: major updates and added encoded link to the Webmasters’ new e-mail address.
December 24
brakes.html — updated to provide a guide to the other brakes pages.
