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.
Category: Updates
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 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!
Unthreaded bottom bracket dimensions
New cribsheet page with dimensions of unthreaded bottom brackets, and compatibility information.
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.
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.
How the i-Motion 9 hub works
New section on how the SRAM i-Motion 9 hub works in the article about that hub.
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.
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.
Handlebar stems…
Major additions to our article about handlebar stem choice and adjustment.
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, with different lengths, intended for different hubs — but importantly, there is a lot of compatibilty among them.
