The SRAM DualDrive hub was the mainstay hub for hybrid gearing for 15 years, from 2000 through 2015. Very many are still in use. Read here about how to install, adjust and adapt its unusual shifting parts.

What's new at sheldonbrown.com
The SRAM DualDrive hub was the mainstay hub for hybrid gearing for 15 years, from 2000 through 2015. Very many are still in use. Read here about how to install, adjust and adapt its unusual shifting parts.

John added photos and a quite a lot of additional information to our page about cables, and the page got too long — so we have split it into two pages. The original cables page now includes more background information — why use cables, the different types, and a video showing how they work. The cable installation page has many new photos, added details, and tricks and tips.

New article about drum brakes — how they work, their advantages and disadvantages, installation, maintenance, safety considerations.

We have a major update to our page on upgrading older bicycles to index shifting. This can be done at a lower cost than you may expect, because there is usually no need to replace the rear wheel! Shifter choices, parts compatibility issues.


Continuing our updates of Shimano internal-gear hub pages, we have now updated our page about Shimano Alfine 11-speed hubs.

Our page listing internal-gear-hub cable pulls lengths is now updated to cover the new Sturmey-Archer rotary (pulley) shifting 3-speeds.

We do minor updates on an ongoing basis and often don’t announce them. Latest is to the cribsheet on cable-pull adapters.
Revisions to the Shimano Rollerbrake page: links to Shimano’s (finally) well-organized compilation of Rollerbrake documentation; information on installing front Rollerbrakes.

Added information on four hubs to the internal-gear hub cable pull cribsheet:
Shimano Alfine 11-speed
SRAM G9
Sturmey-Archer S3X
Sturmey-Archer ASC
Thanks to Jeff Meredith and Michael Wilson for the measurements!