Campagnolo Super Record 12s Rear Derailleur (RD19-SR12)

The Campagnolo Super Record 12s Rear Derailleur (RD19-SR12) is the masterclass of mechanical shifting, designed for the purist who demands Italian elegance paired with 12-speed precision. This derailleur introduced the revolutionary 3D Embrace technology, which uses an innovative internal gear system to keep the derailleur positioned closer to the cassette sprockets. This ensures the chain "embraces" more teeth, resulting in more efficient power transfer, reduced wear, and incredibly crisp shifts even under high load. Constructed using unidirectional carbon fiber and titanium hardware, it remains exceptionally light while providing the structural rigidity needed to maintain perfect alignment across the ultra-narrow 12-speed spacing.

Key Features

• 3D Embrace Technology: An advanced trajectory system that keeps the upper pulley perfectly tracking the cassette profile for superior chain engagement.

• Carbon Fiber Construction: The front rocker arm and external cage are crafted from unidirectional carbon fiber to minimize weight and maximize stiffness.

   

• Ceramic Pulley Bearings: Equipped with premium ceramic bearings in the lower pulley to reduce drivetrain friction and increase longevity.

   

• 12-Tooth Pulley Wheels: Larger pulleys allow for smoother chain movement and reduced friction compared to traditional smaller designs.

   

• Universal Medium Cage: Optimized to work seamlessly with all Super Record 12-speed cassettes (11-29T to 11-34T), eliminating the need for multiple cage lengths.

Specifications

• Drivetrain Speeds: 12-Speed Mechanical

   

• Maximum Low Sprocket: 34T

• Cage Material: Carbon Fiber reinforced technopolymer

   

• Pulley Bearings: Ceramic (USB)

   

• Compatibility: Campagnolo 12-speed mechanical shifters

• Weight: ~181g

   

Typical Components Included

• Super Record 12s Rear Derailleur

• Cable tension adjuster (integrated)

• User Manual