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

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

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

Shimano RD-A070 7-speed road rear derailleur

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.

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

Developed and designed entirely by CeramicSpeed, the Oversized Pulley Wheel (OSPW) System for Shimano 9000/6700 provides the ultimate optimization of your bicycle's drivetrain.

This OSPW System features a set of 17-tooth aluminium Pulley Wheels, availa

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

Replaceable derailleur hanger / dropout 120 Black

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.

New mechanical Record™ 12 Speed rear derailleur: precision, lightness and versatility.

Designed to improve performance and function in every aspect, the new Record™ 12 Speed mechanical rear derailleur has an innovative shape that envelopes the sprocket