Product Details

The CeramicSpeed Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts over standard Shimano systems.

Featuring a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimisation of the rear derailleur. The upper and lower oversized aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings.

What is Coated?
Our coated products are covered by a lifetime warranty. The unique coating formula is a metallic layer that covers the bearing races and makes them 75% harder than steel. Thanks to this, they are highly resistant to corrosion and the coating provides an even lower friction than our standard bearings.

Please note: The OSPW System for 9100/9150 and 8000 SS/8050 SS is NOT compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with the clutch equipped Ultegra RD RX800 & RX805.

• Power savings of the OSPW System for Shimano reach 30%-60%, or more in some cases, over a stock setup.
• 3-5 times longer lifetime than the commonly used standard pulleys on the market.
• Compatibility: Shimano 9100/9150 and 8000 SS / 8050 SS.
• Compatible up to a 32t cassette for both Dura Ace 9100 & Ultegra 8000 derailleurs
• Pulley Material: Aluminium
• Cage Material: Carbon reinforced PA

About CeramicSpeed
Right from the beginning, when ceramic bearings were used to break the 24hr inline skating record, CeramicSpeed has had a focus on winning. Using tech developed for NASA, ceramic bearings are created and used in components for you to go faster more efficiently.