The OSPW X System reduces friction 35-40% over stock pulley configuration. The lightweight custom molded carbon fiber cage ensures durability. This design allows the use of the same length chain as stock pulleys. 

The 14-tooth upper and 18-tooth lower pulley profiles ensure stable chain retention without added drag. 

The OSPW X System is developed, designed and handbuilt in Denmark - and test proven globally. 

Only compatible with 1X specific derailleurs. 

Did you know that this product has a lifetime warranty? That’s right: as of September 1, 2021, all CeramicSpeed ‘Coated’ products and OSPW cages (purchased after January 1, 2021) are covered for life -- that’s how confident CeramicSpeed are in the durability of their products. You can check out the full terms and conditions here.


Pulley Wheels CeramicSpeed 14-tooth upper and 18-tooth lower
Pulley Wheel Material Aluminium
Cage Material Carbon reinforced PA
Bearing Options CeramicSpeed Standard or Coated
CeramicSpeed Grease/oil CeramicSpeed Pulley Oil
Compatibility Shimano XTR M9100-SGS, Shimano XTR M9100-GS and Shimano XT M8100-SGS
Casette Compatibility Up to a 10-51 range
Spring Tension Settings 2 spring tension settings
Speed 12-speed
Discipline Off-Road

What's in the Box?

Complete OSPW System for Shimano XT/XTR 1x12
CeramicSpeed Pulley Oil, 15 ml. 
Sticker Sheet

OSPW Compatibility

• 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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