Threescore and ten…

Posted on July 13, 2014 by John

Sheldon would have been 70 years old on July 14, 2014.sheldonyoung

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Seatpost size database update

Posted on June 29, 2014 by John

Additions to the seatpost size database to include all the sizes which people have reported. Feel free to report more.

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If the chain falls off or jams

Posted on June 9, 2014 by John

New article on how to prevent chain incidents and how to recover from them. Did you know that you can re-engage a dropped chain without getting your hands dirty?

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Bottom bracket information revised

Posted on June 5, 2014 by John

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

Posted on May 12, 2014 by John

jobst-bike2-shortHarriet 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 design and performance.

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Home-brew hybrid gearing

Posted on May 4, 2014 by John

BWR-SRF31Additions 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

Posted on May 2, 2014 by John

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

Posted on April 30, 2014 by John

New article about the SRAM G8 8-speed internal hub gear g8-internals— 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 place on the Web where you can find all this information. And if you happen to read German, we have an absolutely terrible pun for you too. Achtung, indeed!

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Unthreaded bottom bracket dimensions

Posted on April 13, 2014 by John

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

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Kryptonite history

Posted on April 5, 2014 by John

Just posted — an article on the invention and early history of the Kryptonite bicycle lock — including numerous illustrations, and interviews with Stan Kaplan, the inventor, and Michael Zane, who commercialized the product.

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