Rear

11t Jockey wheels, Fits 105 11speed , can be fitted to Ultegra 11speed

Thanks to the new design of the parallelogram, the rear derailleur is now lighter and more rigid, with the most effective and fastest shifting.
The design is derived directly from the 11-speed components with the oversized outer plate to provide greater

Veloce 10x Black Rear Mechs

Thanks to the new design of the parallelogram, the rear derailleur is now lighter and more rigid for the most effective and fastest shifting.

The SRAM GX 2x11 rear derailleur provides incredible shifting speed & precision over the cassette. The X-Actuation technology eliminates slop whilst the Roller Bearing Clutch technology delivers maximum stability making this great over punishing terrain.

Adopting all the technologies that provide the fastest, quietest shifting available, the SRAM Force 22 rear derailleur has been designed with our EXACT ACTUATION™ technology for precise, efficient shifting throughout the extended gear range.

EXACT ACTU

RD-TY300 6/7-speed rear derailleur with mounting bracket

Developed and designed entirely by CeramicSpeed the Oversized Pulley Wheel System for Campagnolo is advanced for the optimization of bike performance. Everything from bearings to the cage is made from the highest quality materials. The oversized aluminium

RD-5800 105 11-speed rear derailleur, GS, for low gear 28-32T, black

Campagnolo CAMPAGNOLO VELOCE BLACK REAR DERAILLEUR SHORT CAGE 10 - SPEED

BBB replacement jockey wheels.
Composite material provided by EMS Swiss, with 40% glass-fiber mixture.
Complete set of bushings for different shifting systems included.
11T. Compatible with Shimano 9 and 10-speed / Mega Range and Campagnolo 11 speed

It doesn't matter if you value a lightweight climbing bike or an aero speedster, drivetrain friction causes drag at any speed, and thus more watts if you want to go faster. And while it's harder to quantify frictional losses compared to say, aero data in

Replaceable derailleur hanger / dropout 120 Black