{"product_id":"kogel-kogel-aero-kolossos-derailleur-pulley-pulleys-road-bike-plas0172-rear-derailleur-pulley-assembly","title":"Kogel Aero Kolossos Derailleur Pulley Shimano 12 - 19T - CNC Aluminum, Ceramics Bearings, Aerodynamic Design for Road, Triathlon \u0026 Time Trial Performance","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eElevate your cycling performance with the Kogel Aero Kolossos Derailleur Pulley for Shimano 12\/19T. Designed for serious road cyclists, triathletes, and time trial enthusiasts, this high-performance derailleur pulley system combines advanced engineering, lightweight materials, and aerodynamic design to optimize shifting precision and minimize drag.\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\u003eCrafted from CNC-machined aluminum, the Kogel Kolossos pulley boasts exceptional durability and stiffness. Its precision-engineered internal spine ensures maximum structural integrity while keeping weight low, contributing to overall bike efficiency.\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\u003eFeaturing Kogel's renowned ceramic bearings equipped with innovative road seals, this pulley system delivers superior rotational smoothness, reduced friction, and long-lasting performance. The aerodynamic profile significantly cuts wind resistance, allowing for faster and more energy-efficient rides-perfect for competitive racing and time-sensitive events.\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\u003eThe Kolossos pulley system is designed specifically for Shimano 12-speed and 19-tooth configurations, ensuring seamless compatibility with Shimano R9200 series, Ultegra, and Dura-Ace Di2 drivetrain setups. Its lightweight, aerodynamic design enhances shift accuracy across the gear range, optimizing power transfer and responsiveness.\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\u003eWith its sleek black finish, the Kogel Aero Kolossos Pulley adds a professional, race-ready look to your bike. Ideal for road racing, triathlons, and time trials, this pulley system is engineered to improve aerodynamic efficiency and drivetrain performance, reducing drag and increasing your speed on every ride.\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 design engineered for minimal wind resistance\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- CNC-machined aluminum construction for strength and lightweight performance\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Ceramic bearings with specialized road seals for smooth, silent operation\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Compatible with Shimano 12-speed drivetrain systems, including Ultegra and Dura-Ace\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003eUpgrade your bike's drivetrain with the Kogel Aero Kolossos Derailleur Pulley for Shimano 12\/19T - the perfect combination of performance, durability, and aerodynamic efficiency for competitive cycling.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eEnhanced aerodynamic design with Kogel's exclusive Aero Kolossos Pulley system, optimized for reducing drag and wind resistance during high-speed cycling, triathlons, and time trials. \u003c\/li\u003e\n\u003cli\u003eConstructed from CNC-machined aluminum for superior durability, lightweight performance, and maximum stiffness, ensuring precise shifting under intense riding conditions. \u003c\/li\u003e\n\u003cli\u003eFeatures advanced ceramic bearings with internal seals, providing exceptional low-friction operation, smoothness, and long-lasting performance in demanding cycling environments. \u003c\/li\u003e\n\u003cli\u003eCompatible with Shimano 12\/19T derailleur systems, including Dura Ace Di2 and Ultegra series, offering seamless integration and reliable gear shifts for competitive road and triathlon riding. \u003c\/li\u003e\n\u003cli\u003eInnovative design combines aerodynamic efficiency with functional use, making it ideal for serious cyclists seeking performance upgrades that enhance speed, stability, and shift accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Kogel","offers":[{"title":"Default Title","offer_id":42203421900867,"sku":"PLAS0172","price":664.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/250650.jpg?v=1773714518","url":"https:\/\/365cycles.com\/products\/kogel-kogel-aero-kolossos-derailleur-pulley-pulleys-road-bike-plas0172-rear-derailleur-pulley-assembly","provider":"365 Cycles","version":"1.0","type":"link"}