OSPW RS ALPHA for SRAM RedD1/E1+ForceD1 v2 Black

The OSPW RS ALPHA is designed for the modern era of integrated, aero-focused road bikes. It bridges the gap between road efficiency and off-road durability by utilizing the ALPHA Disc pulley wheels originally developed for mountain bike transmissions. This solid disc design prevents road grime, sticks, or grass from entering the pulley spokes, while the Active Debris Remover (ADR) technology—a bladed dust cover system—dynamically flings contaminants away from the bearings. Whether you're running the legacy Red D1, the latest Red E1, or the updated Force D2 (v2), this system provides a stiffer, more aerodynamic profile that delivers crisp shifting and a measurable reduction in drivetrain friction.

Key Features

• ALPHA Disc Technology: Solid aluminum disc pulleys eliminate spoke turbulence and prevent debris from snagging, paired with composite teeth for quieter operation and long-term wear resistance.

• Active Debris Remover (ADR): A patent-pending technical feature that uses centrifugal force to extract dirt and water from the bearing groove while the pulley is in motion.

• Reinforced RS Cage: A distinctly modern, angular cage design that is stiffer than previous generations, ensuring reliable shifting even under the high spring tension of AXS derailleurs.

• Further Drive Technology: Optimized tooth profiles and cage geometry ensure the chain flows smoothly, reducing mechanical noise and energy loss.

• Handbuilt Ceramic Bearings: Features CeramicSpeed’s world-class hybrid ceramic bearings, which are significantly harder and smoother than standard steel alternatives.

Specifications

• Compatibility: SRAM Red AXS (D1/E1) and SRAM Force AXS (D1/D2/v2) 12-speed.

• Pulley Setup: 15-tooth upper (guide) and 19-tooth lower (tension) pulleys.

• Max Cassette Size: Supports up to 36T cassettes (standard for Red/Force AXS).

• Bearing Type: Available in Standard or Coated (75% harder races).

• Cage Material: Carbon fiber reinforced Polyamide.

Typical Components Included

• Complete OSPW RS ALPHA System (Cage + Pulleys).

• CeramicSpeed Pulley Oil (15ml).

• Custom tool for cage removal/installation.

• B-Gap adjustment guide.