{"product_id":"shimano-ultegra-br-rs811-r-direct-mount-rear-road-brake-caliper","title":"Shimano Ultegra BR-RS811-R Direct Mount Rear Road Brake Caliper","description":"\u003cp\u003eThe Shimano BR-RS811-R Rear Direct Mount Brake Caliper delivers powerful, controlled road braking in a sleek, low-profile design engineered for under-bottom-bracket mounting. Designed around Shimano’s SLR-EV braking system, it provides an excellent balance of rigidity, low weight, and dependable stopping power.\u003c\/p\u003e\n\n\u003cp\u003eThe direct-mount configuration integrates the brake closely with compatible road frames, creating a clean installation while supporting precise and responsive braking. The BR-RS811-R features a 51mm reach and accommodates tires up to 28C with compatible rim widths from 20.8mm to 28mm.\u003c\/p\u003e\n\n\u003cp\u003eShimano equips the caliper with R55C4 cartridge brake shoes for dependable braking performance on compatible aluminum braking surfaces. The cartridge shoe holder allows convenient pad replacement, while adjustable shoe angle and spring tension make it possible to fine-tune brake setup and performance.\u003c\/p\u003e\n\n\u003cp\u003eThe BR-RS811-R also incorporates tire guide bumpers and is compatible with Shimano’s SLR-EV system. For cable adjustment and quick-release functionality, Shimano specifies use of an SM-CB90 inline cable adjuster.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eRear direct-mount road brake caliper\u003c\/li\u003e\n\u003cli\u003eDesigned for under-bottom-bracket mounting\u003c\/li\u003e\n\u003cli\u003eLow-profile integrated caliper design\u003c\/li\u003e\n\u003cli\u003eSLR-EV compatible\u003c\/li\u003e\n\u003cli\u003e51mm brake reach\u003c\/li\u003e\n\u003cli\u003eMaximum tire size: 28C\u003c\/li\u003e\n\u003cli\u003eCompatible rim width: 20.8–28mm\u003c\/li\u003e\n\u003cli\u003eR55C4 cartridge brake shoes\u003c\/li\u003e\n\u003cli\u003eCartridge-style brake shoe holder\u003c\/li\u003e\n\u003cli\u003eAdjustable brake shoe angle\u003c\/li\u003e\n\u003cli\u003eAdjustable spring tension\u003c\/li\u003e\n\u003cli\u003eIntegrated tire guide bumpers\u003c\/li\u003e\n\u003cli\u003eSM-CB90 inline cable adjuster required for cable adjustment and quick-release functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e BR-RS811-R\u003cbr\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear\u003cbr\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Direct Mount \/ Under Bottom Bracket\u003cbr\u003e\n\u003cstrong\u003eReach:\u003c\/strong\u003e 51mm\u003cbr\u003e\n\u003cstrong\u003eBrake Shoe:\u003c\/strong\u003e R55C4\u003cbr\u003e\n\u003cstrong\u003eMaximum Tire Size:\u003c\/strong\u003e 28C\u003cbr\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Shimano SLR-EV\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":67588647223449,"sku":"BR1714","price":105.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/2029\/1225\/files\/BR-RS811-R-shic219-primary_1_310_310.jpg?v=1790630622","url":"https:\/\/locotri.com\/products\/shimano-ultegra-br-rs811-r-direct-mount-rear-road-brake-caliper","provider":"LocoTri","version":"1.0","type":"link"}