Sram:

The SRAM RED eTap rear derailleur executes shifts the instant you demand. Wirelessly. It’s easy to set up, clean in appearance and delightfully uncomplicated. Mechanical necessities such as a carbon pulley cage, ceramic pulley bearings, and anodized alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder.

FEATURES

• SRAM eTap shift logic and wireless operation
• Fits all 11-speed SRAM road cassettes up to 11-32t
• 2x and 1x compatible
• Updated version of the original SRAM RED eTap rear derailleur
• Orbit chain management technology keeps drivetrain quiet and secure
• Larger X-SYNC pulleys and ceramic bearings for increased durability and efficiency
• Compatible with existing eTap batterie

SPECIFICATIONS
Speed (RD): 11s
Cable pull ratio: n/a
Cage (RD): Short
Max tooth: 33
Color (RD): Black
Pulley bearings material: Ceramic
Cage material (RD): Carbon