Eerily similar in appearance to the first-generation carbon fiber Record rear derailleur. In fact, that's basically what the Chorus rear derailleur is -- one generation bygone Record, minus the super-light alloy hardware. From a performance perspective, it's Record-quality through and through. As... read more

The Centaur rear derailleur is the recipient of some trickle-down technology thanks to its recent upgrade to a carbon fiber front plate. Built in the classic Campy design to provide crisp shifting for any Centaur double drivetrain up to a 13/26 cassette. 223g.

The Record Mid-Cage rear derailleur is specifically built to accommodate a double drivetrain using a 13/29 rear cassette, as well as triple drivetrains that use any cassette ratio except for 13/29. Like the short cage version, the Mid-Cage features a carbon fiber pulley cage. It's interesting to... read more

The Chorus Mid-Cage rear derailleur has the same carbon fiber front cage and new, quieter pulleys as the Chorus Short Cage Double. The Chorus Mid-Cage is specifically built to accommodate a double drivetrain using a 13/29 rear cassette, or a triple drivetrain using any cassette except a 13/29.... read more

The Mid-Cage version of the Centaur rear derailleur is made specifically to accommodate a 53/39 double drivetrain with a 13/29 cassette, or a triple drivetrain using any cassette ratio except for 13/29. The Mid-Cage has carbon fiber construction, a nice bit of trickle-down technology from the... read more

The Dura-Ace 10-Speed rear derailleur has a redesigned Wide Link design with a wider pivot placement between the two parallelograms meant to deliver crisper shifting under heavy-load situations. The wider pivot has the added benefit of increasing the long-term durability of the derailleur. Even... read more

Many in the bike world upgrade not so much when a new part debuts, but when an old part dies. We envision the Shimano Ultegra SL Rear Derailleur as being a popular upgrade item. Parts break, parts wear out. The SL rear derailleur is 9 grams lighter than standard Ultegra, and works with any... read more

Those Head & Shoulders TV ads were absolutely right: You never get a second chance to make a first impression. It's why Campy Record shifts like a dream, same with Shimano Dura-Ace. 90% of a person's judgment on the quality of one gruppo over another takes place in about 5 seconds: It's the 5... read more

Other than the DoubleTap shift lever, perhaps no component in the Force family represents a greater departure from familiar mechanical territory than the rear derailleur. It's a bit of a technical story, but it's one whose benefits are evident the first time you run through your gears: You'll... read more