New article about the SRAM Automatix two-speed hub. We have information on maintenance, choice among variant models, and how to adjust the speed at which it shifts automatically.
SRAM Automatix 2-speed hub
Category: Updates
Morrow coaster brake page revised
Sheldonbrown.com keeps reference material available on older coaster brakes and internal-gear hubs. We’ve just revised the page on the antique Morrow coaster brake
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Gear Calculator updated and now also in German
The Sheldon Brown gear calculator is updated and improved: more tire sizes are covered including fatbikes, 29ers, 29+ and monster bikes, and we now have a version in German, as well as French.
Remembering Sheldon
“The bicycle on the cover was produced on the Management Graphics Table Top Slidemaking System at Crimson Camera Technical Sales in Boston. A bicycle enthusiast created the image using the tablet menu and cursor tracker. The bicycle is made up of 99 vectors, 20 circles, and 5 ellipses. This simple graphic was created to illustrate to customers what 4000-line resolution looks like.”
The “bicycle enthusiast” was Sheldon Brown who worked for a short time at Crimson Camera. Sheldon died eight years ago today.
Riding with RidewithGPS
New article on riding with the RideWithGPS app. What you need to know to get started: mounting your phone, keeping it charged, downloading routes, and recording your rides.
Tools and supplies to work on tires
Article about tools to care for tires and inner tubes (pumps, tire removal and replacement tools, flat-fixing supplies) pulled out of the article on fixing flat tires, which was getting too long, and expanded.
Inner tubes
New article, all about inner tubes: tire fit, the three kinds of valves, pump compatibility, tips and tricks.
Shimano Rollerbrake page updated
Revisions to the Shimano Rollerbrake page: links to Shimano’s (finally) well-organized compilation of Rollerbrake documentation; information on installing front Rollerbrakes.
Additions to the Shimano 8-speed IG hub page
Sheldonbrown.com reader Bruce Dance has contributed some helpful information on compatibility — or the lack of it — among different models. Read it on the 8-speed internal-gear hub page
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Spoking for large hubs, improved
The article on special spoking patterns for use with extra-large hubs (for example, electric bicycle hub motors) has been improved with patterns which avoid twisting the hub shell for two of the hub and rim combinations. The article includes all the information needed to use Damon Rinard’s Spocalc (also on the site) to calculate spoke lengths for these patterns.
