{"product_id":"shimano-tiagra-rd-r4000-11-speed-rear-derailleur-for-road-bikes","title":"Shimano Tiagra RD-R4000 11-Speed Rear Derailleur for Road Bikes","description":"\u003cp\u003eThe Shimano Tiagra RD-R4000 11-speed rear derailleur delivers professional-grade performance at an accessible price point. Designed with a wide link structure, it enhances rigidity and extends durability, ensuring reliable shifting through countless rides. Its lightweight alloy body and outer link reduce overall weight without sacrificing strength, making it an excellent choice for road cyclists seeking efficiency and resilience.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing advanced light action technology, this derailleur offers smooth, low-friction gear changes both up and down the cassette. The two fluorine-coated link pin bushings further improve shifting precision and reduce wear. Compatible with 11-speed chains and optimized for use with CSRS40011146 cassettes and ST-R4020 or ST-U6030 STI shifters, it supports a 36-tooth maximum cassette with a double chainset.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding smooth, precise shifting for 11-speed road bikes\u003c\/li\u003e\n  \u003cli\u003eEnhancing drivetrain durability with its wide link design\u003c\/li\u003e\n  \u003cli\u003eReducing weight without compromising strength\u003c\/li\u003e\n  \u003cli\u003eMaintaining low-friction operation for efficient gear changes\u003c\/li\u003e\n  \u003cli\u003eCompatibility with specific Shimano Tiagra components for seamless integration\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 with 10-speed or non-Shimano drivetrains\u003c\/li\u003e\n  \u003cli\u003eCompatibility outside of specified cassettes and shifters\u003c\/li\u003e\n  \u003cli\u003eOff-road or mountain biking applications requiring different derailleur designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Tiagra RD-R4000 compatible with all 11-speed chains?\u003c\/strong\u003e\u003cbr\u003eIt is compatible specifically with Shimano 11-speed chains designed for Tiagra systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this derailleur with a triple chainset?\u003c\/strong\u003e\u003cbr\u003eNo, it is optimized for double chainsets with a maximum 36-tooth cassette.\u003c\/p\u003e","brand":"Shimano Tiagra","offers":[{"title":"Black \/ One size","offer_id":46690136785071,"sku":"RDR4000","price":64.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/rdr4000.jpg?v=1773923209","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/shimano-tiagra-rd-r4000-11-speed-rear-derailleur-for-road-bikes","provider":"Swinnerton Cycles","version":"1.0","type":"link"}