Item number: 73457
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CeramicSpeed OSPW coated derailleur pulley system for Shimano 9100 / 8000-SS - the ultimate upgrade

With the CeramicSpeed OSPW derailleur pulley system for Shimano Dura-Ace RD-R9100 and Ultegra RD-R8000-SS, you can upgrade your drivetrain for more performance and durability. It consists of a 13-tooth upper derailleur pulley and a 19-tooth lower derailleur pulley (black, gold or red) based on super-smooth ceramic bearings. Additionally, a weight-saving carbon cage is used. Compared to the predecessor model, a stop bolt has been added to simplify the installation. Besides the 11-speed mechanical rear derailleurs mentioned above, this system is also compatible with the Dura-Ace RD-R9150 and Ultegra RD-R8050-SS electronic rear derailleurs. Like all Oversized Pulley Wheel (OSPW) systems from CeramicSpeed, the Shimano version also provides less friction compared to standard derailleur pulleys and allows a significant reduction in power. There are also other advantages of the Coated version: The metallic coating of the bearing races improves the already strong performance even further, the durability also increases and the bearing has almost no wear.

For hazard warnings, safety and application information, please see CeramicSpeed Oil for Derailleur Pulleys.


Road, Triathlon & Time Trial
Cassette Teeth (max.):
Shimano Dura-Ace R9100, 9150, Ultegra R8000-SS, R8050-SS (not for GS cage or cluthed RD-RX800)

Technical Information:

Derailleur Pulleys:
13 tooth (upper derailleur pulley), 19 tooth (lower derailleur pulley)
Outer Cage Material:
polyamide, carbon
Inner Cage Material:
polyamide, carbon
Other Materials:
607 ceramic


  • high-performance bearings with special ceramic balls made of grade 3 silicon nitride (best achievable degree for ceramic bearings)
  • CeramicSpeed bearing balls: 15% harder, 100% smoother and 99% more resilient than commercially available ceramic balls
  • ball bearing retainer made of reinforced polyamide, race made of hardened steel with polished channel
  • additional metal-coated race for more performance and durability
  • unique durability and performance: energy savings of up to 2.4 watts, up to 60% less friction thanks to the OSPW system
  • handmade in Denmark


Ceramic Bearings by CeramicSpeed
CeramicSpeed ceramic balls are rounder, harder, smoother, lighter and more resilient than steel balls and ceramic balls from other manufacturers. CeramicSpeed ceramic bearings therefore last 3 to 5 times longer than other commercially available bearings. All CeramicSpeed bearings are manufactured by hand in Denmark under clean room conditions and are subject to a strict four-stage control procedure. Among other things, the size of the ceramic balls is checked down to the thousandth of a millimetre. Tests are then carried out in the laboratory or preferably by professionals in training and competition. CeramicSpeed bottom brackets guarantee you the lowest possible friction, optimised power transfer and maximum durability and also help you save watts and reach the finish line faster. It's not about seconds, it's about minutes!

The Oversized Pulley Wheel System (OSPW System) is a breakthrough innovation by CeramicSpeed, developed in collaboration with world-class triathletes. This unique system is known for 40 - 60% less friction compared to standard derailleur pulleys and allows power savings of at least 1.6 and up to 2.4 watts. The OSPW system features the unique CeramicSpeed bearing, aluminium derailleur pulleys and a polyamide-carbon cage, making it 3 to 5 times more durable than standard systems on the market. A real advance in the field of cycling performance.

CeramicSpeed coated products offer the ultimate in performance and durability. This is achieved by a unique coating that increases the hardness of the races, so that in combination with the smoothness of CeramicSpeed ball bearings, there is virtually no bearing wear. The coating is a metal layer that is 75% harder than hardened steel. It is applied very thinly (0.003 mm) and evenly over the entire surface of the race and is used both internally and externally for optimum results.

Note from the manufacturer:
The rear derailleur should be completely removed before transporting the bicycle in a travel bag, otherwise the OSPW System could be damaged.

Manufacturer Numbers:



  • 1 x CeramicSpeed OSPW Coated derailleur pulley system for Shimano R9100
  • 1 x CeramicSpeed oil, 15 ml dropper bottle
  • 1 x sticker sheet


  • black/universal, ships in 10 working days after ordering
  • blue/universal, ships in 10 working days after ordering
  • gold/universal, ships in 10 working days after ordering
  • red/universal, ships in 10 working days after ordering

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