CeramicSpeed Oversized Pulley Wheel System Aero Coated - Shimano Dura-Ace 9100/Ultegra 8000
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CeramicSpeed Oversized Pulley Wheel System Aero Coated - Shimano Dura-Ace 9100/Ultegra 8000 Info
The CeramicSpeed Oversized Pulley Wheel System Aero Coated is built for Shimano's Dura-Ace 9100/9150 and Ultegra 8000/8050 11-speed groupsets, pairing oversized 13-tooth and 19-tooth pulleys with an aerodynamic carbon-reinforced cage. The larger pulleys reduce how sharply the chain bends as it wraps around the derailleur, lowering friction through the drivetrain, while the carbon cage is shaped to cut drag — a detail that matters most on time trial and triathlon setups where every bit of aero efficiency counts.
This version uses CeramicSpeed's coated bearings rather than full ceramic hybrid bearings — a coating that makes the bearing races roughly 75 percent harder than untreated steel, aimed at holding smooth, low-friction performance over a long service life rather than wearing in and roughening up the way an uncoated steel bearing eventually does. CeramicSpeed states the complete system delivers energy savings starting from 2.4 watts over a stock Shimano pulley setup, based on the brand's own testing; independent results will vary by rider and setup, but it's the figure CeramicSpeed backs with this product.
The cage includes four spring tension settings so you can adjust chain wrap and cage pressure to your specific derailleur and chain length, and the kit ships with a 15ml bottle of CeramicSpeed's own bearing oil to keep the pulleys running smoothly between services. It's the same aero-focused OSPW format that's shown up in professional World Tour and Ironman-distance triathlon setups, where the combination of drag reduction and drivetrain efficiency carries real weight over long, steady efforts.
At $599.25, this is a component for riders who've already settled on the aero and efficiency case for an OSPW system and are running 9100 or 8000-series Shimano — it's not a casual upgrade, and it won't do anything for riders on a different groupset generation. It's best suited to time trial, triathlon, and long-distance road riders looking to shave drag and friction on a bike they're already dialed in everywhere else.
