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Author Archives: John
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 … Continue reading
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.
Posted in Updates
Tagged compound, gearing, gears, hub, internal, internal-gear, multi-stage, Nexus, planetary, repair, Sachs, shimano, SRAM, Sturmey-Archer
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Frayed cable
John has added a photo of a frayed cable to the article on cables.
Posted in Updates
Tagged bicycle, Bowden, bowden cable, brake, brake cable, cable, failure, fatigue, shifter, shifter cable
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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.
Posted in Updates
Tagged articles, bicycle, chain, chains, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, tandem, tandems
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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.
Posted in Updates
Tagged articles, bicycle, cyclecomputer, GPS, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, tires, tyres
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Stuck seatposts
John has added information on yet another way to remove a stuck seatpost — dissolving it using a strong chemical.…
Posted in Updates
Tagged bicycle, lye, maintenance, removal, remove, repair, seatpost, shelbroco, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, stuck
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GoPro HD Helmet Hero camera
John’s review of this popular camera is still a work in progress (no pictures yet) but is ready enough to make public.
Posted in New pages
Tagged bicycle, camera, GoPro, HD, HD Helmet Hero, shelbroco, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, video
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