{"product_id":"shimano-ultgera-st-r8170-bled-hydraulic-disc-di2-e-tube-sti-set-flat-mount-calliper-lh-rear","title":"Shimano Ultgera ST-R8170 bled hydraulic disc, Di2 E-tube STI set, flat mount calliper, LH rear","description":"\u003cp\u003eExperience the pinnacle of road cycling technology with the Shimano Ultegra ST-R8170 bled hydraulic disc and Di2 E-tube STI set. Designed for serious cyclists, this left-hand rear component combines cutting-edge wireless shifting with powerful hydraulic braking, delivering seamless control and precision on every ride. The flat mount caliper ensures a sleek, aerodynamic fit, while the advanced Servo Wave technology provides exceptional stopping power with minimal effort, enhancing your confidence from hood position to hard braking moments.\u003c\/p\u003e\n\n\u003cp\u003eBuilt for efficiency and customization, the Ultegra Di2 shifting system offers effortless gear changes with just a light touch. Its fully and semi-synchronized shifting options allow you to tailor your riding experience, enabling one shifter to control both front and rear derailleurs perfectly. The tactile buttons are ergonomically placed for intuitive use, even in cold weather, maintaining comfort during long rides. This kit comes complete with bled ST-R8170 STI levers, BR-R8170 flat mount brake calipers, pads, hoses, and mineral oil, making it ready to install and perform right away.\u003c\/p\u003e\n\n\u003cp\u003eWith finely tuneable reach adjusters, the levers adapt to fit any hand size, ensuring optimal ergonomics and control. The hydraulic reservoir auto-adjusts pad to rotor clearance, maintaining consistent braking power as pads wear. Powered by long-lasting CR1632 batteries, this Di2 system promises reliability and a maintenance-free experience for up to two years. Whether you're climbing steep hills or sprinting on flat roads, this Shimano Ultegra component set delivers the precision and stopping power you need to perform at your best.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding smooth, wireless electronic shifting for fast and precise gear changes\u003c\/li\u003e\n  \u003cli\u003eDelivering powerful and modulated hydraulic braking with minimal hand effort\u003c\/li\u003e\n  \u003cli\u003eAllowing customizable synchronized shifting to suit individual rider preferences\u003c\/li\u003e\n  \u003cli\u003eEnsuring consistent braking performance with automatic pad clearance adjustment\u003c\/li\u003e\n  \u003cli\u003eOffering ergonomic lever reach adjustment for comfort and control on long rides\u003c\/li\u003e\n  \u003cli\u003eEnhancing road cycling performance with a lightweight, aerodynamic design\u003c\/li\u003e\n  \u003cli\u003eSupporting 12-speed road discipline with reliable Di2 electronic transmission\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse in mountain biking or off-road disciplines due to road-specific design\u003c\/li\u003e\n  \u003cli\u003eCompatibility with mechanical shifting systems or non-Di2 components\u003c\/li\u003e\n  \u003cli\u003eInstallation without compatible rotors or adapters, which are sold separately\u003c\/li\u003e\n  \u003cli\u003eRiders seeking a wired shifting setup, as this model is wireless\u003c\/li\u003e\n  \u003cli\u003eUse on bikes without flat mount disc brake mounts or left-hand rear configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this STI set compatible with my current Shimano Ultegra Di2 drivetrain?\u003c\/strong\u003e\u003cbr\u003eYes, the ST-R8170 set is designed specifically for Shimano Ultegra Di2 12-speed systems and will integrate seamlessly with other R8100-series components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the kit include brake rotors and adapters?\u003c\/strong\u003e\u003cbr\u003eNo, this kit includes the bled STI levers, brake calipers, pads, hoses, and mineral oil but does not come with rotors or brake adapters, which must be purchased separately.\u003c\/p\u003e","brand":"Shimano Ultegra","offers":[{"title":"Default Title","offer_id":45995858722991,"sku":"XR8170DLR","price":299.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/djnszcgzeuzxr7v9hvs2.jpg?v=1768534106","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/shimano-ultgera-st-r8170-bled-hydraulic-disc-di2-e-tube-sti-set-flat-mount-calliper-lh-rear","provider":"Swinnerton Cycles","version":"1.0","type":"link"}