CeramicSpeed OSPW RS ALPHA – Shimano 9250 / 8150
The CeramicSpeed OSPW RS ALPHA Shimano 9250/8150 is an Oversized Pulley Wheel (OSPW) system designed for Shimano Dura-Ace R9250 and Ultegra R8150 electronic rear derailleurs. It is engineered to reduce drivetrain friction, improve shifting efficiency, and enhance overall durability.
Key Features
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Compatible with Shimano Dura-Ace R9250 / Ultegra R8150
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Modern RS ALPHA reinforced cage design
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Reduced chain friction for improved efficiency
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Patented ADR (Anti Debris Resistance) technology
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Fully sealed, high-protection bearing system
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Modular design with customization options (logos, pulley variants)
Technology
ADR Technology (patented)
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Advanced dust cover system prevents debris from entering bearings
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Dynamic groove structure actively removes dirt while rotating
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Improves durability in all riding conditions
ALPHA Disc pulley wheels
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Two-piece construction
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Composite narrow-wide tooth profile for reduced noise and wear
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Solid aluminum disc prevents debris from entering the pulley
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Increased stiffness and durability
Technical Specifications
| Specification | Details |
|---|
| Type | Oversized Pulley Wheel (OSPW) system |
| Compatibility | Shimano R9250 / R8150 |
| Intended Use | Road / Triathlon |
| Pulley Material | Aluminum / Composite |
| Net Weight | ~102 g |
| SKU | 113490 |
In the box
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Complete OSPW RS ALPHA system for Shimano 9250/8150
In practice
This system is a performance upgrade for the rear derailleur, designed to reduce friction in the drivetrain and improve pedaling efficiency. It is especially suited for high-performance road racing and triathlon use, where every watt matters.
