OSPW for Campagnolo 12-speed EPS

The OSPW system for Campagnolo 12-speed EPS is a precision-engineered drivetrain upgrade that replaces the standard derailleur cage and pulleys with a custom-molded carbon fiber cage and significantly larger pulley wheels. By utilizing a 13-tooth upper and 19-tooth lower pulley setup, it reduces the chain's articulation angle, which directly lowers friction and chain drag. This system is designed specifically for the unique geometry and high-precision shifting of the Super Record EPS 12-speed series. Handbuilt in Denmark, it offers a measurable performance advantage, saving approximately 2-3 watts over a stock configuration while providing a service life 3–5 times longer than standard pulleys.

Key Features

• Massive Friction Reduction: Reduces overall drivetrain friction by 35-40% compared to the stock Campagnolo pulley configuration.

• Custom Carbon Fiber Cage: Features a compact, lightweight, and durable molded carbon fiber cage engineered specifically for electronic shifting precision.

• 3 Spring Tension Settings: Allows riders to customize their setup; use high tension for crisp shifting in rough conditions or low tension to maximize raw watt savings.

• Handbuilt Ceramic Bearings: Equipped with high-grade silicon nitride balls that are significantly harder and smoother than traditional steel alternatives.

• EPS Optimized Geometry: Unlike mechanical versions, this system is tuned to the specific motor torque and movement patterns of the Campagnolo 12-speed EPS rear derailleur.

Specifications

• Compatibility: Campagnolo Super Record EPS (12-speed electronic only).

• Pulley Sizes: 13-tooth upper and 19-tooth lower.

• Max Cassette Size: Compatible with cassettes from 11T to 34T.

• Cage Material: Polyamide-reinforced carbon fiber.

• Pulley Material: Lightweight Aluminum.

• Constraint: NOT compatible with Campagnolo 12-speed mechanical or 12-speed Wireless groupsets.

Typical Components Included

• Complete OSPW System (Cage and 13T/19T Pulley Wheels).

• CeramicSpeed Bearing Oil (15ml dropper bottle).

• User manual and installation guide.

• CeramicSpeed sticker sheet.