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CeramicSpeedOversized Pulley Wheel System

$529.00 - $589.00

Item # CMD000S

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  • Black, Shimano, R9200/R8100 12-Speed ($589.00)
  • Campagnolo, Black, 11 Speed ($529.00)
  • Campagnolo, Red, 11 Speed ($529.00)
  • Campagnolo, Red, 12 Speed EPS ($589.00)
  • Red, Shimano, R9200/R8100 12-Speed ($589.00)
  • Black, SRAM, eTap 11 Speed ($529.00)
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Item # CMD000S

Why We Like The Oversized Pulley Wheel System

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 Specs
Material[cage] nylon, carbon fiber, [pulleys] aluminum
CompatibilityCampagnolo EPS and mechanical, SRAM eTap, Shimano Ultegra R8000/8050, Dura-Ace R9100/9150
Activityroad cycling, triathlon, time trial
Manufacturer Warranty4 years

Actual Weight

Black, Shimano, R9200/R8100 12-Speed
Campagnolo, Black, 11 Speed
Campagnolo, Red, 11 Speed
Campagnolo, Red, 12 Speed EPS
Red, Shimano, R9200/R8100 12-Speed
Black, SRAM, eTap 11 Speed

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead


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

Have questions? Chat with a Gearhead

What do you think about this product?



Does it fit Campagnolo super record 12 speed (Mechanical)? Thank you!

>Rating: 5

Spendy but worth it for my needs

I've used it once or twice and have initial impressions

I have SRAM RED22 eTap, 2016, which is the short cage, max 28 tooth on the cassette. With 20,000km on it I needed to replace the pulley wheels which was going to be $120 and since moving to the Northwest I rarely have a ride with less than 1,000 meters of climbing and often have 14-18% grades to deal with so I wanted the ability to got to an 11-30 or 11-32 cassette. One option was to purchase a new WiFLi mid cage eTap rear derailleur, not a cheap option either. So all in going to the Ceramicspeed OPWS ends up being a somewhat less expensive though still pricey alternative. Installing the OPWS on the RED22 eTap rear derailleur replacing the stock short cage is pretty easy. Watch the video and if you are reasonably good with tools this is a 30 minute job the first time, I could probably do it in 15 minutes the second time around. I run a 50/34 chainwheel set up and with an 11-30 cassette the chain length ended up being full length on a SRAM RED22 chain minus just two links. Make some minor adjustments and out the door. From a shifting perspective I went with the

Glad to know this works. I spend half the year where it is dead flat and a 25 on the rear is enough, but each summer we spend in the Blue Ridge where the first 30 minutes out my door is a 680 meter climb; I was looking for a "budget" way to fit a 32 on the back and saw this said it fits. Thanks for confirming.


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


this product doesn't work with Ultegra DI2,

Hey Charles and Charles D! This particular version of the OSPW system only works with the newest series of Shimano derailleur (9100/8000). If you have the previous series (9000, 6800/6870), it's not going to work. Please feel free to reach out to us directly if you have any more questions!


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