{"product_id":"rd-r8150","title":"RD-R8150 (ULTEGRA)","description":"\u003ch3 class=\"list_anchor_cs_h3\"\u003eSHIMANO RD-R8150 (ULTEGRA) | Shimano's Fastest Shifting 12-Speed Di2 Rear Derailleur\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eULTEGRA Di2: Less time thinking about shifting, more time focusing on your ride.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"RD-R8150\" from the SHIMANO ULTEGRA R8100 series is the core rear derailleur of the 12-speed Di2 system.\u003c\/p\u003e\n\u003cp\u003eAchieving approximately 58% faster rear shifting compared to the previous generation, it reacts instantly to rider input. It delivers smooth and accurate shifting performance even under load, such as during climbs, high-speed cruising, or sprints.\u003c\/p\u003e\n\u003cp\u003eBy integrating the wireless unit, charging port, and switch into a compact body, it offers both a clean appearance and easy maintenance. Furthermore, its wide-range design, compatible with up to 34T, caters to a broad range of uses, from race-oriented setups to long-distance rides and hill-climbing specifications.\u003c\/p\u003e\n\u003cp\u003eThis Di2 rear derailleur, inheriting the shifting performance and reliability of the higher-end DURA-ACE, is set to become the new standard for modern road bikes.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"list_anchor_cs_h3\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e12-speed Di2 rear derailleur compatible with ULTEGRA R8100 series\u003c\/li\u003e\n\n\u003cli\u003eRear shifting approximately 58% faster than previous models\u003c\/li\u003e\n\n\u003cli\u003eCompact design integrating wireless unit, charging port, and switch\u003c\/li\u003e\n\n\u003cli\u003eWide-range design compatible with up to 34T sprockets\u003c\/li\u003e\n\n\u003cli\u003eEquipped with LED status indicator\u003c\/li\u003e\n\n\u003cli\u003eEasy to check battery level and pairing status\u003c\/li\u003e\n\n\u003cli\u003eAdopts SHIMANO SHADOW RD design\u003c\/li\u003e\n\n\u003cli\u003eHigh durability with fluorine-coated link bushings\u003c\/li\u003e\n\n\u003cli\u003eSupports both wired and wireless Di2 connectivity\u003c\/li\u003e\n\n\u003cli\u003eSuitable for a wide range of uses, from racing to long rides\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"list_anchor_cs_h3\"\u003eSPEC\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eSeries: ULTEGRA R8100\u003c\/li\u003e\n\n\u003cli\u003eModel: RD-R8150\u003c\/li\u003e\n\n\u003cli\u003eCompatible speeds: 12-speed\u003c\/li\u003e\n\n\u003cli\u003eMax front difference: 16T\u003c\/li\u003e\n\n\u003cli\u003eTotal capacity: 39T\u003c\/li\u003e\n\n\u003cli\u003eMax low sprocket: 34T\u003c\/li\u003e\n\n\u003cli\u003eMin low sprocket: 30T\u003c\/li\u003e\n\n\u003cli\u003eTop sprocket: 11T\u003c\/li\u003e\n\n\u003cli\u003eMount: Direct mount \/ Direct mount compatible\u003c\/li\u003e\n\n\u003cli\u003eSpring type: Top-normal\u003c\/li\u003e\n\n\u003cli\u003eDesign: SHIMANO SHADOW RD\u003c\/li\u003e\n\n\u003cli\u003eAverage weight: Approx. 262g\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMany riders who use the R8100 generation Di2 are often surprised by the speed of its shifting response.\u003c\/p\u003e\n\u003cp\u003eIt feels as if the shift is completed the moment the lever is pressed, maintaining your riding rhythm whether you're climbing or on flat terrain. This lack of stress is a major advantage, especially during long rides.\u003c\/p\u003e\n\u003cp\u003eIts compatibility with up to 34T sprockets makes it versatile, suitable not only for race-oriented gear configurations but also for hill climbs and audax events. Its all-around adaptability is a key selling point.\u003c\/p\u003e\n\u003cp\u003eThis is a reliable, standard model to choose when adopting Di2, and it's a central ULTEGRA component that strikes an excellent balance between performance and price.\u003c\/p\u003e","brand":"SHIMANO","offers":[{"title":"In-store stock","offer_id":50119778697491,"sku":"4550170240967","price":51565.0,"currency_code":"JPY","in_stock":false},{"title":"Order from manufacturer (approx. 10 days)","offer_id":50119778730259,"sku":"oty-4550170240967","price":51565.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/4237\/2883\/files\/RD-R8150_1.jpg?v=1732530587","url":"https:\/\/store-eirin-jp.com\/en\/products\/rd-r8150","provider":"京都の自転車屋 CYCLE SHOP eirin ＆ サイクルハテナ","version":"1.0","type":"link"}