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CeramicSpeed OSPW X for Shimano GRX/RX 2x11 Black Coated 108531
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CeramicSpeed OSPW X for Shimano GRX/RX 2x11 Black Coated

This 13-tooth lower and 19-tooth upper OSPW System has been platform proven at races like Paris Robaix, Strada Bianche and CX World Cups. 

The system is built for gravel and cross disciplines and meets the needs for durability, low friction and longevity. 

The four spring tension settings allow customised setup based on ride conditions, and the handbuilt OSPW System offers custom molded carbon fiber cage for lightweight and durability. 

CeramicSpeed OSPW Systems reduces friction 35-40% over stock pulley configuration. 

Only compatible with 2X systems. Not compaitble with 42-tooth cassettes

In the box:

  • Complete OSPW System for Shimano GRX/RX 2x11
  • CeramicSpeed Pulley Oil
  • Sticker Sheet

Tech Data

  • Pulley Wheels: CeramicSpeed 13-tooth upper and 19-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 GRX 810 & GRX 815, Shimano Ultegra RX 800 & Ultegra RX 805 
  • Casette Compatibility: Up to a 11-36 range
  • Spring Tension Settings: 4 spring tension settings
  • Speed: 11-speed
  • Discipline: Gravel/Cross

How to save watts

Maximise your performance when riding

Your choice, your advantage

One hidden force affects your speed and efficiency on the bike – friction. That’s why, when you’re optimising your bike, it’s worth focusing on every detail, especially the small moving parts that are affected by friction.

CeramicSpeed technology focuses on reducing friction and producing bearings with an unmatched lifetime, meaning that you get to ride faster or save energy. With CeramicSpeed products in your hubs, pulley wheels and bottom bracket, tests show that you’ll save between 6–9 watts, compared to using standard bearings. Those savings increase further with the use of a CeramicSpeed UFO Racing Chain. This will save between 2–5 watts, taking your competitive advantage up to 14 watts.

Upgrading your rear derailleur to the CeramicSpeed Oversized Pulley Wheel System completes the optimisation equation. Thanks to the unique design and componentry, the oversized pulley wheels reduce friction in the derailleur by 40–60% when compared to the high-end pulley wheels usually used in the cycling industry. By reducing friction with every opportunity, the CeramicSpeed technology can round up the watt savings between 10 and 16 watts.

We are not talking about saved seconds but saved minutes 

CeramicSpeed products help you ride faster using less energy. This can be the difference between winning and losing. Whether you ride for pleasure or you are a pro athlete fighting the clock, you will always benefit from riding with CeramicSpeed bearing products and chains, as well as using the fastest bottled product for chains, UFO Drip. Take advantage whether you are riding road, off-road or triathlon.

Save 10-16 watts using Hub Bearings, Bottom Bracket, an OSPW System and UFO Chain. Alternatively, upgrade your bike with a standard CeramicSpeed Bearing upgrade (includes Hub Bearings, Bottom Bracket and 11-tooth Pulley Wheels and results in 6-9 watts energy savings), or add the CeramicSpeed UFO Chain to the standard upgrade and save a total of 8-14 watts.


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