The most common questions we get asked about Oversized Pulley Wheel Systems

Watch as we answer the most frequently asked questions about our CeramicSpeed OSPW System or read the questions below.

The Benefits of Narrow Wide Pulley Wheel Tooth Profile

Will the CeramicSpeed OSPW System fit my SRAM or Campagnolo rear derailleur?

The CeramicSpeed OSPW System is currently compatible with Campagnolo, Shimano Ultegra/Dura Ace 10s and 11s both electronic and mechanical, as well as for Shimano 9100/9150 and for SRAM eTap, Force, Red, Rival and Apex.

Do I need a new chain if I install the OSPW System?

Due to the oversized pulley wheels and the need for a longer chain, we recommend installing a new, uncut chain. We do not recommend using additional links to an existing chain.

Is a standard chain long enough or should I buy a special long chain?

A standard chain is long enough to fit the new OSPW System. You will need to remove fewer, if any, links when installing a new standard chain.

How does the CeramicSpeed OSPW System differentiate from other systems with big pulley wheels?

The CeramicSpeed OSPW System has been proven to be the fastest pulley system in the world, and for good reason. No pulley wheel system on the market today provides energy savings starting from 1.6 watts (for SRAM) and 2.4 watts (for Shimano) over standard systems, meaning between 30% and 60%. The energy savings found in our unique 17-tooth OSPW System are a result of sleek design, high-quality materials along with two high precision 17-tooth aluminium pulley wheels that carry CeramicSpeed Bearings.

Has the frictional data been verified by an independent third party lab?

The OSPW System has been put through extensive road and laboratory testing, both in-house and in collaboration with third parties. Former American independent test laboratory, Friction Facts, has been used to test friction performance of the OSPW System (Friction Facts was acquired by CeramicSpeed November 2016). The tests conducted by Friction Facts have seen the OSPW system go up against the most commonly used stock pulley wheels, test runs have been performed making use of a new chain and a 'typically seen' dirty chain. Tests have been made at 95 RPM in 53/12 gear, using a Reactive Torque Pulley Tester (RTPT).

Will the CeramicSpeed UFO Chain work with the OSPW System?

The CeramicSpeed UFO Chains are compatible with the OSPW System and will help you save an additional 2-5 watts.

Does the OSPW System work for MTB?

The CeramicSpeed OSPW System has been developed primarily for Road but can also be used for cyclecross. The system is not suitable for mountain bike applications.

What size cassette can I use with the OSPW System?

The OSPW System for Shimano fits up to 28t on most bikes, depending on rear derailleur hanger. The OSPW System for Shimano 9100/9150 fits up to 32t cassettes. Best shifting performance is achieved with Shimano cassettes. The rear geometry and gear drop of a bike decides what cassette size the OSPW System fits. The OSPW System for SRAM fits up to 32t cassettes.

Where can I purchase?

The OSPW System is available for purchase through all CeramicSpeed dealers worldwide and via the CeramicSpeed webshop.

How does the OSPW System affect the performance when changing the spring tension between High and Low?

When using the highest spring tension setting your energy savings using the OSPW System starts at 30%-60%. When changing to the lower spring tension the energy savings will increase, however, lower spring tension might affect gear shifting performance so please test thoroughly.

Does the OSPW System for Shimano work with Di2 and 9100/9150?

Yes, the OSPW System works with Di2 11s and 10s gear groups.

For Shimano 9100/9150 we have developed a special System, designed to fit the Shimano derailleur, featuring 13/19-tooth combination.

How much does the CeramicSpeed OSPW System cost?
The price of the OSPW System is €459 for the standard version and €539 for the coated versions.

Does the OSPW System compromise the shifting performance?

No. One of the main focuses during the development of the OSPW System has been to maintain perfect shifting performance.

How long does the OSPW System last? Is it something I just put on for racing?

The OSPW System is suited for use in both training and racing environments. We recommend that the system is continuously used. The OSPW System is fitted with the same high-quality CeramicSpeed Bearings as all our other products, resulting in your OSPW System spinning just as fast many years from now. The cage, pulleys and hardware are all made of high-quality materials; carbon reinforced polyamide, aluminium and titanium. The OSPW System is covered by the CeramicSpeed warranty program: 4 years warranty in the standard bearing version and 6 years in the coated version.

How much does the OSPW System weigh?

Thanks to the lightweight materials used, the OSPW System weighs approx. 70 g, making the difference between a standard rear derailleur pulley system and the CeramicSpeed OSPW System negligible. The small addition to the weight is not a compromise to your bike performance thanks to the overall capabilities of the system.

What are the aerodynamic advantages of the system?

The system has been in two separate wind tunnels, one in Scandinavia and one in North America. No aero loss has been recorded on the system. In fact, at a certain yaw angle, the system recorded a positive sail effect when running with a certain depth of wheel.

Will the OSPW System fit in a bike travel bag?

Most often you will have to dismount the entire rear derailleur when travelling. Use an Allen Key to disassemble and reassemble it before use. Most bike travel bags do not allow the space for the complete rear derailleur when fitted with the OSPW System.