Shimano 9-speed cassettes

One-ramp sprocket for Shimano Hy0perglide cassette
One-ramp sprocket for Shimano Hyperglide cassette
Two-ramp 15T sprocket for Shimano Hyperglide cassette
Two-ramp 15T sprocket for Shimano Hyperglide cassette

Major update to our page on Shimano and Shimano-compatible 9-speed cassettes. We’ve fixed broken links from when manufacturers updated *their* Web pages, and updated information on availability.

SRAM Automatix 2-speed hub

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.

Exploded diagram of the SRAM Automatix hub
Exploded diagram of the SRAM Automatix hub

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.
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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.

RidewithGPS

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.

A good patch kit
A good patch kit

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

Shimano Nexus hub
Shimano Nexus hub

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