John has posted an article on how to synchronize video shot at the same time with more than one camera, and another on image stabilization. These are meaty technical articles.
John has written an article about helmets and helmet issues. It includes a blast from the past, John’s photo of Sheldon in 1978 wearing a pre-Igor the Eagle helmet, and photos documenting changes in helmet design since the 1970s.
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..
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.
Posted in Updates
Tagged compound, gearing, gears, hub, internal, internal-gear, multi-stage, Nexus, planetary, repair, Sachs, shimano, SRAM, Sturmey-Archer
John has added a photo of a frayed cable to the article on cables.
John added photos of a frame pump, mini pump and CO2 inflator to flats.html.
chains.html — substantial revisions.
tandem.html, tandem2.html — minor revisions.
Pictures from this year’s Larz Anderson Bike Fair and Bike Swap can be found at
John Allen has done some revisions to the articles on tires/tyres and added more information on GPS to the article on cyclecomputer calibration.
John has done a major update and expansion of Sheldon’s article on Sun Tour components.
Posted in Updates
Tagged Accushift, Barcons, bicycle, Blaze, components, Cyclone, derailer, derailleur, gearing, gears, GPX, hub, Maeda, New Winner, Olé, parallelogram, Perfect, Pro Compe, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, slant parallelogram, Sprint, Sun Tour, SunTour, Superbe, Superbe Pro, VGT, Winner