About SRAM RED eTap A2 11 Speed Rear Derailleur
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 anodised alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder.

Battery Not Included

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 batteries

Now forwards compatible with 12-speed RED and Force eTap AXS controllers and eTap AXS Blipbox

Technology
WiFLi: WiFLi = Wider - Faster – Lighter.
 SRAM's WiFLi Technology is based on the compact 2 x 10 or 11 - two front chainrings and 10 or 11 gears in the rear - design inherent in SRAM RED 22, Force 22, Rival 22 and Apex, which delivers a wider range of gears, up to 11-32, than your standard triple, faster shifts through two chainrings and every gear on the rear cassette, and with significant weight savings. WiFLi cassettes are also available for Force CX1.

X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation.

eTap: All of the underlying tech in the new SRAM RED eTap groupset, such as wireless shifting, advanced battery power management, and mechatronics technologies, are meant to serve one ultimate purpose: to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. Right lever makes it harder, left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive.

Orbit: Orbit technology is an innovative new form of derailleur motion control. It utilises silicon fluid as part of an elegant and ultra-lightweight damper system. Compared to a standard friction clutch system, Orbit technology places no additional resistance on the rear derailleur’s spring when under slow or light movement. This means easier shifting and rear wheel removal. And while riding, the fluid damper reduces chain bounce. It’s rock-solid reliability for both 1x and 2x systems.

Specifications
Speed (RD): 11s

Cable Pull Ratio: n/a

Cage (RD): Short

Max Tooth: 33

Colour (RD): Black

Pulley Bearings Material: Ceramic

Cage Material (RD): Carbon

Model ID: RD-RED-E-A2

About SRAM
Founded in 1987, SRAM (an acronym of the 3 founders names, Scott, Ray and Sam) is a privately owned bicycle component manufacturer located in Chicago. They're known for developing many of the inovative technologies used in bikes today including ETAP wireless electric shifting, Grip Shift, dedicated single chain ring drivetrains, narrow wide chainrings and more. Sram also own bicycle component brands Rockshox, Quarq, Zipp and Truvativ.