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..

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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.

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Frayed cable

John has added a photo of a frayed cable to the article on cables.

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Flats photos

John added photos of a frame pump, mini pump and CO2 inflator to flats.html.

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Updates on chains and tandems

chains.html — substantial revisions.

tandem.html, tandem2.html — minor revisions.

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Pictures from the 2011 Larz Anderson Bike Fair

Pictures from this year’s Larz Anderson Bike Fair and Bike Swap can be found at

http://sheldonbrown.com/Larz2011/

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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.

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Sun Tour components

John has done a major update and expansion of Sheldon’s article on Sun Tour components.

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Larz Anderson Bike Fair – 8/20/2011

Remember the Larz Anderson Bike Fair and Bike Swap:
http://sheldonbrown.com/images/bikeswap.pdf

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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.

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