CeramicSpeed Coated OSPW System Shimano Dura Ace 9250/Ultegra 8150 - Turquoise is the ideal choice for cyclists who want outstanding performance and durability. With its metallic layer coating, the bearing races are highly resistant to corrosion and provide an even lower friction than standard bearings. Its unique stop tower and carbon polyamide cage make it easy to install and incredibly durable.With dual 13 / 19-tooth oversized pulleys, the OSPW System provides 30%-60% energy savings, perfect for those long rides where every bit of energy matters. Plus, the CeramicSpeed oil and dropper bottle included give you an added boost to keep your gears running smoothly for longer. This system is designed specifically for 12-speed road bikes, compatible with Shimano Dura Ace 9250/Ultegra 8150 and suitable for all cycling disciplines. The OSPW System's lifespan is 3-5 times longer than standard pulleys, and its ceramic bearings offer superior performance. Invest in CeramicSpeed Coated OSPW System Shimano Dura Ace 9250/Ultegra 8150 - Turquoise for a smoother, more efficient, and longer-lasting ride.