The CeramicSpeed Oversized Pulley Wheel System was developed for the ultimate obsession with maximum performance and attention to detail that many top competitors possess. CeramicSpeed ups the ante with reduce friction of the Coated version. The OSPW derailleur cage and pulley wheels are the result of an in-depth development process and have been designed to reduce friction to the greatest extent possible. The oversized 17T pulleys are capable of spinning with as much as 60% faster speeds than stock pulleys, which can help to create the ultimate efficient drivetrain. Testing has demonstrated that at just 2.4 watts of power, energy is being saved in the pulley system. When seconds, and tenths of seconds determine winning, personal bests, and/or age-group dominance, the OSPW system is your best friend. To give even greater bearing protection and overall reduced friction, a super thin (2 microns) protective coating is applied to the bearing races. This further increases the resistance of the bearing to corrosion or damage from foreign object while ensuring lower friction and greater durability within the bearing system itself.

Those familiar with CeramicSpeed's pulley wheels will do a double take at the sheer minimalism of the OSPW 17T machined aluminum pulleys. Of course the pulley wheels feature the high quality, precision built CeramicSpeed Grade 3 Silicon Nitride balls that possess the best possible surface finish and roundness. The 57 gram OSPW system includes a specially fabricated derailleur cage that has been designed to replace your existing derailleur cage, and all models have a specific specification. No special installation is required, you just install the system exactly as you would the stock cage assembly. This ultra-light, yet stiff and resilient cage is made from carbon fiber and reinforced polymide. Aero testing shows the oversized cage has no negative effects on aerodynamics, so there are no trade-offs inherent in the design.

Concerned about durability or other issues? There are considerations, but not from wear. CeramicSpeed pulleys last 3-5 times as long as most of these top-market derailleur's stock pulleys, which offer great life themselves. Keep in mind that these bearings require lubrication. CeramicSpeed provides the proper oil and instructions you will need to keep your bearings spinning easily at high speed. Also, if you do travel with your bike in a bike bag, you will want to remove the cage before packing as there is not enough clearance in most bags and the cage is susceptible to damage. We recommend you install a new chain when you install the OSPW, as you will need a longer chain. Might as well maximize efficiency by opting for CeramicSpeed's UFO chain! The upper and lower specific pulleys of the OSPW are directional, so when you remove them, re-install properly.

Top pro cyclists and triathletes can attest to the value of the OSPW system. Whether or not this is the correct upgrade for you is a decision you will have to make. If you are the type that has ceramic upgrades in your wheels and bottom bracket (CeramicSpeed, of course), then you will consider the Coated pulley wheels or Coated OSPW. If saving watts and seconds matter most, go OSPW and feel the freedom of the fastest pulley wheel system developed to date.