{"product_id":"kogel-kogel-aero-kolossos-derailleur-pulley-pulleys-road-bike-plas0173-rear-derailleur-pulley-assembly","title":"Kogel Aero Kolossos Derailleur Pulley System for Shimano 12 - 19T - CNC Machined Aluminum, Ceramic Bearings, Aerodynamic Design for Road, Triathlon \u0026 Time Trial Performance","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your cycling performance with the Kogel Aero Kolossos Derailleur Pulley for Shimano 12\/19T. Engineered for precision and speed, this high-performance derailleur pulley system is ideal for road cycling, triathlons, and time trials where aerodynamics and efficiency are critical.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Durability:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eCrafted from CNC-machined aluminum, the Kogel Aero Kolossos pulley boasts a lightweight yet robust construction designed to withstand rigorous cycling conditions. Its internal spine enhances stiffness and durability, ensuring long-lasting performance season after season.\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 Kolossos pulley system features an aerodynamic design that significantly reduces wind resistance, helping you shave seconds off your ride. Its precision engineering maintains exceptional shift accuracy, even under high-speed, high-power scenarios, making it perfect for competitive cycling and demanding rides.\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\u003eEquipped with Kogel's advanced ceramic bearings and sealed road seals, these pulleys deliver ultra-smooth rotation and minimal friction. The ceramic bearings ensure reduced rolling resistance, increased pace, and quieter operation-delivering a silky-smooth gear shift every time.\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 for Shimano 12-speed Ultegra and Dura-Ace Di2 series derailleur systems, including the Shimano R9200 platform, the Kogel Aero Kolossos pulleys are a perfect upgrade for cyclists seeking cutting-edge aerodynamic technology. Suitable for road racers, triathletes, and time trial specialists looking to optimize their bike's efficiency and speed.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative Features:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Aero treatment for maximum wind deflection\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Fully CNC machined aluminum construction for precision and strength\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Internal spine for enhanced stiffness and longevity\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Ceramic bearings with sealed seals for unmatched smoothness and durability\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Compatible with Shimano 12\/19T derailleur setups\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eEnhance your bike's drivetrain with the Kogel Aero Kolossos Derailleur Pulley-where engineering excellence meets sleek aerodynamic design for superior cycling performance.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eEnhanced aerodynamic design with Kogel's proprietary aero pulley system, optimized for reduced wind drag during road cycling, triathlons, and time trials. \u003c\/li\u003e\n\u003cli\u003eConstructed from CNC-machined aluminum with an internal spine reinforcement ensures maximum stiffness, durability, and precise shifting under high-performance riding conditions. \u003c\/li\u003e\n\u003cli\u003eFitted with high-quality ceramic bearings and specialized road seals, delivering smooth, silent operation and long-lasting performance even in challenging weather environments. \u003c\/li\u003e\n\u003cli\u003eCompatible with Shimano 12\/19T derailleur systems, including Shimano Ultegra and Dura-Ace Di2, as well as SRAM Red AXS, making it a versatile upgrade for high-end road bikes. \u003c\/li\u003e\n\u003cli\u003eDesigned for competitive cyclists seeking improved efficiency and speed, this pulley combines advanced engineering, lightweight materials, and stylish aesthetics for race-ready performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Kogel","offers":[{"title":"Default Title","offer_id":42203421671491,"sku":"PLAS0173","price":666.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/250651_13849c9a-f3e1-4d66-98ce-a86e58f9157d.jpg?v=1773714533","url":"https:\/\/365cycles.com\/products\/kogel-kogel-aero-kolossos-derailleur-pulley-pulleys-road-bike-plas0173-rear-derailleur-pulley-assembly","provider":"365 Cycles","version":"1.0","type":"link"}