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.
Category: Updates
Helmets
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.
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.
Frayed cable
John has added a photo of a frayed cable to the article on cables.
Flats photos
John added photos of a frame pump, mini pump and CO2 inflator to flats.html.
Updates on chains and tandems
chains.html — substantial revisions.
tandem.html, tandem2.html — minor revisions.
Pictures from the 2011 Larz Anderson Bike Fair
Pictures from this year’s Larz Anderson Bike Fair and Bike Swap can be found at
More updates
John Allen has done some revisions to the articles on tires/tyres and added more information on GPS to the article on cyclecomputer calibration.
Sun Tour components
John has done a major update and expansion of Sheldon’s article on Sun Tour components.
