The recently-released iPad app Cyclepedia is for the most part a very slick, enhanced presentation of 100 bicycles in a historical collection ranging from 1920 to the present. The photography is superb, the bicycles are of many different types, and the app makes full use of the iPad to rotate and zoom the images, even to swipe images of folding bicycles to see how they fold. Cyclepedia was app of the week in the UK iPad store. It references sheldonbrown.com for further technical information.
Category: Updates
Sun Tour bicycle components
Several additions to the Sun Tour article, especially about freewheels.
Fixed articles fixed!
Fixed articles fixed! Sheldon kept an older version of his fixed-gear articles online so as not to break Web links from other sites. These articles are now updated to the same content as the newer version.
Addition to wheelbuilding page
New information in the wheelbuilding page about removing the bend from spokes where they exit the hub flange…
Updates to pages about helmet cameras
Writeup on Bike Touring News
Bridgestone 1982 Catalog
Thanks to Daniel den Hartog for his PDF of the 1982 Bridgestone Bicycles catalog, now online from the Bridgestone table of contents page along with all the other catalogs from 1985 through 1994 and a wealth of other information.
Isvan on Power Management
Osman Isvan has written a paper, Power Management for Lightweight Vehicles, and has been kind enough to send it for posting on sheldonbrown.com. Isvan gives special attention to how to make the most efficient use of electrical-assist power. His conclusions are probably not what you expect!
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.
