Author Archives: John

8-speed Shimano hubs — update

We have updated our page on Shimano 8-speed hubs. Shimano changed a number of links and posted some new information.

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How the i-Motion 9 hub works

New section on how the SRAM i-Motion 9 hub works in the article about that hub.

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New article and paper by Osman Isvan

New article by Osman Isvan introducing and summarizing his series of technical papers about bicycling propulsion, wind, hills and measurement techniques. And a new paper about measurement, too.

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Biopace chainrings

We like Shimano Biopace non-round chainrings, and they are reliably available on eBay. We have expanded our article on how to choose and use them.

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Handlebar stems…

Major additions to our article about handlebar stem choice and adjustment.

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Sturmey-Archer indicator spindles

John has compiled an article with dimensions of most kinds of Sturmey-Archer indicator spindle – the little rod and chain which the shifter cable pulls to shift the gears inside the hub. There are over a dozen different indicator spindles, … Continue reading

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Shimano Nexus 4-speed

John has put together a new article about the Shimano Nexus 4-speed internal-gear hub, with links to a parts list and servicing information. This hub has been discontinued, but in case you want to keep one going…

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Additions to Nexus/Alfine 8-speed article

John has added information to the article about Shimano Nexus and Alfine 8-speed internally-geared hubs, describing common failure modes and how to forestall failure; how to determine whether a hub might need service; and also normal noises and “clunks” which … Continue reading

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Sheldon’s desktop images

We present a collection of images of bicycles and parts that Sheldon felt “some folks might find fun to use as a screensaver”. They might be used for desktop images. The images are all 1024 x 768 pixels, horizontal orientation. … Continue reading

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SRAM i-Motion 9 internal-gear hub

New article about the SRAM i-Motion 9 internal-gear hub — the only public source of information on how to rebuild this hub, and with links to installation information and (hard to find!) parts lists from SRAM.

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