Shimano GRX / RX 810,12,15,17 - (Max 42T Mono / Max 36T Double) - Oversized Derailleur Cage Gravel - 14/19T

The CyclingCeramic Oversized Pulleys have been specially designed to offer an exceptional improvement in the performance and efficiency of your Shimano GRX810/815 + RX800/805 derailleur. Manufactured from high-quality materials and equipped with advanced technology, these pulleys are the perfect choice for demanding cyclists looking to unleash the full potential of their Shimano GRX810/815 + RX800/805 transmission.

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1. Aluminum Pulleys and Carbon Plates: CyclingCeramic Oversized Pulleys are equipped with precision-machined aluminum pulleys, combined with lightweight and durable carbon plates. This material combination ensures a significant weight reduction while providing superior strength, perfectly suited for road requirements. Their sleek and aerodynamic design enhances the overall aerodynamics of your transmission, helping you gain speed and efficiency.
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2. Ceramic Bearings Technology: The ceramic bearings in CyclingCeramic Oversized Pulleys are specifically tailored for Shimano GRX810/815 + RX800/805 derailleurs. With these high-quality bearings, you benefit from a notable reduction in friction during gear changes, resulting in smoother transmission and noticeable energy savings. Enjoy a more efficient pedaling experience, optimizing your performance during climbs and sprints.
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3. Gravel advantage: The CyclingCeramic Oversized Pulleys come into their own during your gravel escapades. Thanks to their ingenious design, they offer an optimal adaptation to your transmission by allowing the addition of up to 2 extra teeth on a gravel cassette. This subtle modification significantly improves transmission efficiency, providing increased power in demanding conditions. Whether you're tackling steep climbs or challenging terrains, the CyclingCeramic oversized pulleys maximize your transmission's performance, allowing you to confidently conquer gravel challenges. Enjoy a smooth riding experience and improved traction, propelling you forward even in the toughest situations.
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4. Tested by Frictions Facts: CyclingCeramic Pulleys bearings derailleurs have undergone rigorous testing by Frictions Facts, an independent laboratory specializing in analyzing friction and transmission efficiency in cycling. The test results have confirmed that CyclingCeramic's ceramic bearings are among the fastest in the market, with a measured friction of only 0.033w. This exceptional performance ensures ultra-efficient transmission, allowing you to gain speed and precision during your rides.
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\nCompatibility: CyclingCeramic Oversized Pulleys are perfectly compatible with Shimano GRX810/815 + RX800/805 derailleurs, providing you with a tailor-made solution to enhance the performance of your transmission. \n \nGive your Shimano GRX810/815 + RX800/805 derailleur a competitive edge with CyclingCeramic Oversized Pulleys. Experience smooth transmission, improved responsiveness, and increased durability during your bike rides. Choose excellence and push your limits with CyclingCeramic! \n \n  \n \nCompatible with Shimano GRX810/815 + RX800/805 \n \nWe recommand to use a new chain for better setting and add 2 to 4 links more.