Author Archives: John

which tire fits which rim?

Major revision of the page on rim sizing to determine what tires will fit

Posted in Updates | Leave a comment

SRAM G9 Hub

Our article about the SRAM G8 hub now also covers the new G9 9-speed.

Posted in Updates | Leave a comment

Threescore and ten…

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

Posted in Updates | Leave a comment

Seatpost size database update

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

Posted in Updates | 4 Comments

If the chain falls off or jams

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?

Posted in Updates | Leave a comment

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.

Posted in Updates | Leave a comment

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

Posted in Updates | 2 Comments

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.

Posted in Updates | Leave a comment

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.

Posted in Updates | Leave a comment

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

Posted in Updates | Leave a comment