Category Archives: Updates

Bottom bracket information revised

We’ve added David Richardson’s photo of damage to a Shimano Octalink V1 crank from installing it on a V2 spindle to the bottom-bracket database. Also, we’ve coordinated bottom-bracket threading standards tables in the several files where they appear.

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Jobst Brandt pages updated

Harriet has reorganized the Jobst Brandt pages — formatting for easier reading, placing them into categories and in sequence, fixed broken links. Brandt’s trenchant comments demolish a number of bicycling myths, and bring an engineering perspective to issues of mechanical … Continue reading

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Home-brew hybrid gearing

Additions to the article on internal-gear hubs — more about how to construct a multi-speed hybrid-gearing system using a stock 3-speed hub and two sprockets and/or two chainwheels. It indexes even without index shifters! Photo courtesy of Mark Stonich.

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Skid patch counts

Correction to formula and additional info including a calculation spreadsheet for the number of skid patches on the rear tire from skip-stop braking on a fixed-gear bicycle.

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SRAM G8 Hub

New article about the SRAM G8 8-speed internal hub gear – all you need to know to install this hub: specifications, gear ratios,  parts compatibility and availability, how the mechanism works.  As far as we know, this is the one … Continue reading

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Unthreaded bottom bracket dimensions

New cribsheet page with dimensions of unthreaded bottom brackets, and compatibility information.

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Leather saddle update

Major additions to our page on leather saddles — descriptions and photos of different Brooks saddle models, comments on other brands, lots more advice on adjustments and leather care.

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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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