OSPW RS ALPHA for Shimano 7150

The OSPW RS ALPHA is a modern, angular evolution of the traditional oversized pulley system. It features a reinforced, injection-molded carbon fiber cage that provides superior stiffness and shifting precision. This system is defined by its ALPHA Disc Pulley Wheels, which use a solid aluminum disc construction. This design eliminates the "fan effect" of traditional spokes and prevents road debris or grass from getting caught in the pulleys. It is further enhanced by Active Debris Remover (ADR) technology—a patent-pending system that uses centrifugal force and a unique dust cover to dynamically extract contaminants while you ride.

Key Features

• ALPHA Disc Technology: Solid aluminum disc pulleys increase lateral stiffness for faster, more reliable gear changes and a cleaner aesthetic.

• Active Debris Remover (ADR): Integrated bearing protection that flings mud and water away from the bearings, ensuring the system remains "clog-proof."

• Further Drive Technology: Optimized 13-tooth upper and 19-tooth lower pulley profiles designed specifically for Shimano 12-speed chains to minimize noise.

• Customizable Tension: Features adjustable spring tension settings, allowing riders to prioritize either maximum power savings or high-tension chain security.

• Lifetime Warranty: Due to the extreme durability of the ALPHA discs and ADR protection, this system comes standard with handbuilt ceramic bearings backed by a lifetime warranty.

Specifications

• Compatibility: Shimano 105 Di2 (RD-R7150) 12-speed only.

• Max Cassette Size: Supports up to a 36T cassette.

• Pulley Material: Solid Aluminum with composite tooth profiles.

• Bearing Type: Coated Ceramic (75% harder races than steel).

• Cage Material: Carbon fiber reinforced Polyamide.

Typical Components Included

• Complete OSPW RS ALPHA System for Shimano 7150.

• CeramicSpeed Pulley Oil (15ml).

• Custom Shimano 105 cage installation tool.

• B-Gap adjustment tool.