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  • CeramicSpeed Oversized Pulley Wheel System
  • CeramicSpeed Oversized Pulley Wheel System
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  • CeramicSpeed Oversized Pulley Wheel System Detail
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CeramicSpeedOversized Pulley Wheel System

Item # CMD000S

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  • Black, SRAM, eTap 11 Speed ($499.00)
  • Black, Campagnolo, 11 Speed ($499.00)
  • Red, Shimano, R9100/R8000 11 Speed ($499.00)
  • Red, SRAM, eTap 11 Speed ($499.00)
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Item # CMD000S

Smooth spinning.

It doesn't matter if you value a lightweight climbing bike or an aero speedster, drivetrain friction causes drag at any speed, and thus more watts if you want to go faster. And while it’s harder to quantify frictional losses compared to say, aero data in the wind tunnel or grams on a scale, if you are looking for every ounce of high-performance and want to go as fast as possible with the least amount of wattage expenditure, ceramic bearings in bigger derailleur pulleys makes plenty of sense. Take a look at some of the GC leader's bikes, especially on important TT stages. Many will be running CeramicSpeed's Oversized Pulley Wheel System, sponsor correct or not, to go as fast as they can when it matters most. Now, you too can enjoy the benefits the pros count on when drivetrain friction isn't tolerated during your own rides and races.

The remarkable cage and pulley systems are developed and hand assembled in Denmark. The products are all tested in the lab and with feedback from professional riders and mechanics to ensure it works great in the field and installs easily. CeramicSpeed claims the OSPW System is the fastest pulley system in the world providing an energy savings of around 1.6 watts for SRAM and 2.4 watts for Shimano over their standard pulleys. As a bonus, CeramicSpeed's testing shows that these pulleys last anywhere from 3-5 times longer than stock.

We have models for Shimano, Campagnolo, and SRAM eTap rear derailleurs. The OSPW System for SRAM features two 17-tooth aluminum pulley wheels with the accommodating cage made from nylon and carbon fiber and can fit cassettes up to 32 teeth. For Campy riders, the system uses a 13-tooth top and a 19-tooth bottom and provides a claimed 40% reduction in friction over the standard 11-tooth Campagnolo pulley wheels. It too can fit up to a 32-tooth cassette and is compatible with all Campagnolo electronic rear derailleur (EPS) and all mechanical rear derailleurs utilizing a mounting sleeve. The OSPW System we have for Shimano is compatible with 11-speed Ultegra 8000/8050 and Dura-Ace 9100/9150 electric and mechanical groupsets except R8000 GS. It features an optimized 13/19-tooth combination developed to fit the design of the derailleur and up to a 32-tooth cassette. 
  • Oversized pulleys and ceramic bearings to cut friction losses
  • Choose between black and red anodized pulley wheels
  • Reduces chain articulation for less drag
  • Bearings last 3-5 times longer than standard pulleys
  • When every second counts, count on this pulley/cage combo
Tech SpecsWeight
Tech Specs
[cage] nylon, carbon fiber, [pulleys] aluminum
Campagnolo EPS and mechanical, SRAM eTap, Shimano Ultegra R8000/8050, Dura-Ace R9100/9150
Recommended Use
road cycling, triathlon, time trial
Manufacturer Warranty
4 years

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

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Black, SRAM, eTap 11 Speed
Black, Campagnolo, 11 Speed
Red, Shimano, R9100/R8000 11 Speed
Red, SRAM, eTap 11 Speed

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Shimano dura ace rd- 9000

Is ceramic speed pulley compatible with rd dura ace 9000 -see picture- also which product of bottom bracket would fit Cervélo p3? Thanks

Shimano dura ace rd- 9000

this product doesn't work with Ultegra DI2,

Avg. ride time: 3h 22m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Is this pulley system compatible with my Ultegra 6700 groupset?

This will only work with 11 speed so it will not work with ultegra 6700 unfortunately. Ceramicspeed compatible with Campagnolo EPS and mechanical, SRAM eTap, Shimano Ultegra R8000/8050, Dura-Ace R9100/9150