Designed and developed entirely by CeramicSpeed, the Oversized Pulley Wheel System for Shimano RX800/805 provides the ultimate optimization of your bicycle's drivetrain. 
The 13-tooth upper and 19-tooth lower aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings. 
This OSPW X System has a custom molded carbon fiber cage for lightweight and durability. The 4 tension spring settings allow for optimal drivetrain setup based on riding conditions. 
OSPW X is specifically designed for both road, gravel and cross riding and is platform proven at races like Paris Roubaix, Strada Bianche and CX World Cups. 

Features

OSPW X for Shimano RX800/805 fits cassettes up to 36-tooth (11-36 range).
This OSPW system reduces friction 35-40% over stock pulley configuration. 
The oversized pulley wheels have 3-5 longer lifetime than the commonly used standard pulleys on the market. 
This product offers a 4 years warranty on the non-coated version and 6 years on the coated version. 

What's in the Box?

A complete 13/19-tooth OSPW System
CeramicSpeed Bearing Oil in 15ml dropper bottle

OSPW Compatibility

Notes:
• Adjustment of spring tension can allow for customization of user experience. Higher spring tension can focus on chain rentention & crisp shift response. Lower spring tension will reduce chain drag and improve overall efficency.
• The CeramicSpeed OSPW cage design has been tested for aerodynamic impacts in multiple wind tunnels. No measurable adverse aerodynamic impacts were measured through a variety of yaw angles.
• Shimano Ultegra R8000 GS, R8050 GS, and 105 derailleurs are not compatible with any CeramicSpeed OSPW system.
• SRAM Rival, & SRAM Apex derailleurs are not compatible with any CeramicSpeed OSPW system.

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