{"product_id":"shimano-ultegra-di2-fd-r8150-front-derailleur-braze-on","title":"Shimano Ultegra Di2 FD-R8150 Front Derailleur 2x12-Speed Braze-On — Electronic Road Bike, Black\/Silver, 110 g","description":"\u003cp\u003eThe Shimano Ultegra Di2 FD-R8150 is a 2x12-speed electronic road front derailleur that brings Shimano's flagship Di2 shifting to the Ultegra tier. It shifts 45% faster than the previous generation, weighs just 110 g, and has a 33% smaller frontal area for cleaner aerodynamics — fast, precise front shifts in any condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMount \u0026amp; compatibility:\u003c\/strong\u003e This is a \u003cstrong\u003ebraze-on\u003c\/strong\u003e front derailleur that bolts directly to a frame with dedicated braze-on bosses. For clamp-style frames, add Shimano's \u003cstrong\u003eSM-AD91\u003c\/strong\u003e band adapter (sold separately). It is a \u003cstrong\u003e2x (double)\u003c\/strong\u003e derailleur for \u003cstrong\u003eShimano 12-speed road Di2\u003c\/strong\u003e drivetrains (Dura-Ace R9200, Ultegra R8100, 105 R7100 Di2) — it does not work with 11-speed or mechanical systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Shimano Ultegra FD-R8150 (R8100 series, Di2)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Front derailleur — electronic (Di2)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 2 x 12-speed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChainrings:\u003c\/strong\u003e Double (2x)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount type:\u003c\/strong\u003e Braze-on (SM-AD91 clamp adapter sold separately)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Down-swing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax chainring:\u003c\/strong\u003e 54T (supports up to 55T) · \u003cstrong\u003eCapacity:\u003c\/strong\u003e 16T · \u003cstrong\u003eChainline:\u003c\/strong\u003e 44.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChainstay angle:\u003c\/strong\u003e 61–66°\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShift actuation:\u003c\/strong\u003e Electronic (semi-wireless Di2; connects to battery via EW-SD300 wire)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 110 g (3.9 oz)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\/Silver\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnology Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e45% faster shifting\u003c\/strong\u003e than the previous generation — fast, seamless front changes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAero, low-profile design:\u003c\/strong\u003e 33% smaller frontal area reduces drag at the center of the drivetrain.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSemi-wireless Di2:\u003c\/strong\u003e Wireless shifter signal; derailleur powered via the central battery for consistent, cable-free front shifts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide chainring support:\u003c\/strong\u003e Optimized for 50-34, 52-36, and 54-40T road\/CX combinations, up to a 55T ring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eRoad and all-road riders building or upgrading a Shimano 12-speed Di2 drivetrain (Dura-Ace R9200, Ultegra R8100, or 105 R7100 Di2) who want fast, light, precise electronic front shifting at the Ultegra price point.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Shimano Ultegra Di2 FD-R8150 front derailleur (braze-on)\u003c\/li\u003e\n  \u003cli\u003eFixing bolt \u0026amp; support bolt\u003c\/li\u003e\n  \u003cli\u003eShimano documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCondition \u0026amp; Shipping\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new in retail packaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShips from:\u003c\/strong\u003e Ontario, California (US domestic)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEstimated delivery:\u003c\/strong\u003e 3–5 business days\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e Free 30-day returns\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":42973469638767,"sku":"IFDR8150F","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/8840\/1263\/files\/IMG_2349_BrinVO.jpg?v=1746645998","url":"https:\/\/www.brinvo.com\/products\/shimano-ultegra-di2-fd-r8150-front-derailleur-braze-on","provider":"BrinVO","version":"1.0","type":"link"}