SheldonBrownBlog

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.

Several additions to the Sun Tour article, especially about freewheels.

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.

New information in the wheelbuilding page about removing the bend from spokes where they exit the hub flange…

John has updated pages about the GoPro and Contour helmet cameras to cover new models.

Nice writeup of sheldonbrown.com!

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.

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.

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.