{"product_id":"ceramicspeed-ospw-rs-alpha-pulleys-road-bike-mrdp0192","title":"CeramicSpeed OSPW RS Alpha Pulley System for Shimano Dura-Ace 9250 \u0026 Ultegra 8150 12-Speed, Carbon Fiber Reinforced Cage, Silicon Nitride Bearings","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your Shimano Dura-Ace 9250 and Ultegra R8150 12-speed road groupset with the CeramicSpeed OSPW RS Alpha Pulley Wheel System - a pinnacle of engineering precision, performance, and style. Crafted for serious cyclists seeking optimal efficiency and durability, this advanced derailleur pulley system features groundbreaking materials and innovative technologies designed to elevate your riding experience.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eBuilt with injection-molded carbon fiber reinforced PA, the cage offers unmatched strength and durability while maintaining lightweight performance. The 13-tooth upper and 19-tooth lower Alpha disc pulleys are equipped with Grade 3 Silicon Nitride ball bearings, renowned for being 400% smoother, 128% harder, and 58% lighter than standard steel balls. Enclosed with Active Debris Remover (ADR) bearing protection, these pulleys ensure long-lasting, low-friction operation even in challenging riding conditions.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eThe OSPW RS Alpha System is engineered to optimize rear derailleur efficiency, reducing drivetrain friction for crisper, faster shifts and increased power transfer. The advanced cage design provides enhanced strength and reinforcement, allowing for secure and precise gear changes under load. With four customizable spring tension settings, riders can fine-tune the system for peak performance and individual riding style.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eFeaturing innovative narrow-wide tooth profiles on the Alpha pulleys, this system helps prevent debris ingress and chain derailment, ensuring smooth, reliable shifting. The use of CeramicSpeed's proprietary low-friction bearings minimizes energy loss, boosting overall drivetrain efficiency. The system is compatible with Shimano Dura-Ace R9250 and Ultegra R8150 12-speed rear derailleurs and is designed to accommodate cogs up to 34 teeth.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eDesigned with a sleek, modern, and angular aesthetic, the OSPW RS Alpha seamlessly integrates with contemporary road bikes. Its silver finish complements a wide range of drivetrain setups, elevating the visual appeal of your bike. Ideal for competitive cycling, long-distance riding, or high-performance training, this pulley system offers a premium upgrade for riders demanding the best in efficiency, durability, and advanced technology.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative \u0026amp; Differentiating Features:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Injection-molded carbon fiber reinforced cage for superior durability\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Active Debris Remover (ADR) bearing protection for contaminants prevention\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Grade 3 Silicon Nitride bearings delivering exceptional smoothness and hardness\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Narrow-wide tooth profile to prevent debris build-up and chain drop\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Four customizable spring tension options for tailored setup\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003e- Compatible with major Shimano 12-speed groupsets (Dura-Ace R9250 \/ Ultegra R8150)\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-17\"\u003e\u003cp\u003eUnlock unparalleled drivetrain performance with the CeramicSpeed OSPW RS Alpha Pulley Wheel System - the perfect choice for cyclists who demand precision, efficiency, and style on every ride.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eEnhanced durability with injection-molded aluminum and carbon fiber reinforced PA cage for long-lasting performance and lightweight strength. \u003c\/li\u003e\n\u003cli\u003eDesigned for high-efficiency cycling, featuring CeramicSpeed's Grade 3 Silicon Nitride ceramic bearings that are 400% smoother and significantly more durable than standard steel bearings, reducing friction and increasing speed. \u003c\/li\u003e\n\u003cli\u003eInnovative Active Debris Remover (ADR) technology fully encloses the pulley bearings, protecting against dirt and debris for consistent, maintenance-free operation during demanding rides. \u003c\/li\u003e\n\u003cli\u003eSleek, modern aesthetic with angular, aerodynamic design that seamlessly integrates into Shimano Dura-Ace R9250 and Ultegra R8150 groupsets, complementing contemporary bike styles. \u003c\/li\u003e\n\u003cli\u003eCustomizable spring tension settings allow precise tuning for optimal derailleur performance, ensuring smooth shifting and maximum efficiency on every ride.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"CeramicSpeed","offers":[{"title":"Default Title","offer_id":42355639156803,"sku":"MRDP0192","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/DP0075.jpg?v=1779336792","url":"https:\/\/365cycles.com\/products\/ceramicspeed-ospw-rs-alpha-pulleys-road-bike-mrdp0192","provider":"365 Cycles","version":"1.0","type":"link"}