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.
Tag: hub
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.
Sun Tour components
John has done a major update and expansion of Sheldon’s article on Sun Tour components.
John Allen’s updates to the site 12/2010-3/2011
March 13-22-25
headsets.html – major updates including instructions on adjustment of threaded headsets; added exploded diagrams; resized photos and added a photo of a “brinelled” bearing race. More to come — photos of disassembly/reassembly.
March 12
velos.html — added comments in favor of the Peugeot UO-8 frame.
March 11
tooltips/cartridge.html — added information about Velo Orange French-threaded bottom bracket.
February 18
raleigh26.html Minor update (fixed formatting of a list, and one spelling error)
home-drop.html — noted unavailability of commercial drop bolts, pointed to my own implementation, ran a spell check.
January 1
saddles.html — added information on saddle width. tire pressure and width, and suspension seatposts.
December 28
gears/index.html, gears/internal.html, braquets/index.html — I put the new Sturmey-Archer S2 into the calculators. SA used the same model number for a different hub in 1966.
December 27
deakins/lowgears.html
December 26
speeds.html — added information about SRAM 10-speed systems
k7.html — added information on 9 of 10 on 7
k7-7.shtml — updated to indicate cassettes now no longer available
gearing/index.html — added links to more pages about gearing
December 25
seatpost-sizes.html and seatpost-sizes-m-z.html,: major updates and added encoded link to the Webmasters’ new e-mail address.
December 24
brakes.html — updated to provide a guide to the other brakes pages.
