CeramicSpeed OSPW RS Alpha Disc for Shimano 9250/8150 – Niro Special Edition | Oversized Pulley Wheel System
Upgrade your drivetrain with the CeramicSpeed OSPW RS Alpha Disc Niro Special Edition, designed specifically for Shimano Dura-Ace R9250 and Ultegra R8150 12-speed Di2 road groupsets. This high-performance oversized pulley wheel system (OSPW) delivers cutting-edge aerodynamics, durability, and smooth, efficient shifting, ideal for road racers, triathletes, and performance-focused cyclists.
The Niro Special Edition features a sleek, stealth-inspired dark finish paired with black ALPHA Disc Pulley Wheels for a refined, race-ready look. Engineered for the modern rider, this OSPW system combines advanced materials with proprietary innovations like Active Debris Remover (ADR) and ALPHA Disc technology, setting new benchmarks in pulley wheel performance and protection.
- Compatible with Shimano 9250 & 8150 Di2 12-speed road derailleurs
- Oversized pulley system for maximum drivetrain efficiency and reduced friction
- Niro Special Edition finish with black ALPHA Disc pulley wheels for sleek aesthetics
- ALPHA Disc Pulley Technology: Enhanced stiffness, mud clearance, and noise reduction
- Active Debris Remover (ADR): Innovative protection system to keep bearings clean and running smooth
- Reinforced cage design for improved strength, impact resistance, and durability
- Two-piece pulley wheel construction for extended wear life and resistance to contamination
- Developed with feedback from pro cyclocross and road race teams
Performance Benefits:
- Reduced drivetrain drag for enhanced watt savings
- Silky-smooth shifting across all cogs, even under load
- Superior contamination resistance in wet, muddy, or dusty conditions
- Engineered for endurance and racing – ideal for long-distance and pro-level events
- Designed to integrate seamlessly into modern aero and carbon road bikes
What’s Included:
- 1 x CeramicSpeed OSPW RS ALPHA Disc Pulley System – Niro Special Edition
- Pre-installed black ALPHA Disc Pulley Wheels
- Fully assembled and ready for installation on Shimano 9250/8150 derailleurs
Built for performance-driven cyclists, the OSPW RS Alpha delivers tangible power gains through optimised drivetrain efficiency. Trusted by WorldTour teams and elite athletes, it’s a premium upgrade that combines race-winning aerodynamics, innovation, and style, now available in this exclusive Niro Special Edition.