{"product_id":"shimano-grx-rd-rx400-bicycle-derailleurs","title":"SHIMANO GRX RD-RX400 Bicycle Derailleurs","description":"\u003ch1\u003e\u003cstrong\u003eSHIMANO GRX RD-RX400 Bicycle Derailleurs\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Shimano GRX RD-RX400 is a 10-speed rear derailleur designed for gravel and mixed-surface riding, featuring Shimano's Shadow RD+ clutch system to improve chain retention and drivetrain stability on rough terrain.\u003c\/p\u003e\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGravel bike riders using a Shimano 10-speed drivetrain.\u003c\/li\u003e\n\u003cli\u003eCyclists riding mixed terrain, including pavement, gravel, and dirt roads.\u003c\/li\u003e\n\u003cli\u003eAdventure and bikepacking riders seeking improved chain security.\u003c\/li\u003e\n\u003cli\u003eRiders upgrading to a clutch-equipped rear derailleur for rough conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot ideal for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e11-speed or 12-speed Shimano drivetrains.\u003c\/li\u003e\n\u003cli\u003eSRAM or Campagnolo shifting systems.\u003c\/li\u003e\n\u003cli\u003eMountain bike drivetrains requiring MTB-specific derailleur compatibility.\u003c\/li\u003e\n\u003cli\u003eUsers with incompatible Shimano road shifters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat this product does\u003c\/h3\u003e\n\u003cp\u003eThe RD-RX400 controls rear gear changes while using Shimano's Shadow RD+ clutch mechanism to reduce chain movement over rough terrain. This helps minimize chain slap, improve drivetrain stability, and reduce the likelihood of dropped chains during gravel and off-road riding.\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCompatible only with Shimano 10-speed drivetrains.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible only with the following Shimano shifters:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eST-RX400\u003c\/li\u003e\n\u003cli\u003eST-4700\u003c\/li\u003e\n\u003cli\u003eST-4720\u003c\/li\u003e\n\u003cli\u003eST-4725\u003c\/li\u003e\n\u003cli\u003eST-RS405\u003c\/li\u003e\n\u003cli\u003eSL-4700\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned for Shimano GRX 10-speed gravel systems.\u003c\/li\u003e\n\u003cli\u003eCompatible with Shimano Shadow RD+ drivetrain technology.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNot compatible with Shimano 11-speed or 12-speed shifters.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNot compatible with SRAM or Campagnolo shifting systems.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShadow RD+ clutch reduces chain slap on rough terrain.\u003c\/li\u003e\n\u003cli\u003eHelps prevent dropped chains during gravel riding.\u003c\/li\u003e\n\u003cli\u003eProvides more stable and controlled shifting over mixed surfaces.\u003c\/li\u003e\n\u003cli\u003eClutch can be turned on or off depending on riding conditions.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for gravel and adventure riding applications.\u003c\/li\u003e\n\u003cli\u003eLow-profile Shadow design helps reduce exposure to impacts.\u003c\/li\u003e\n\u003cli\u003eDelivers smooth and reliable shifting performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct Type: Rear derailleur.\u003c\/li\u003e\n\u003cli\u003eModel: Shimano GRX RD-RX400.\u003c\/li\u003e\n\u003cli\u003eSeries: GRX.\u003c\/li\u003e\n\u003cli\u003eSpeed Compatibility: 10-speed.\u003c\/li\u003e\n\u003cli\u003eCage Length: Long Cage.\u003c\/li\u003e\n\u003cli\u003eColor: Black.\u003c\/li\u003e\n\u003cli\u003eTechnology: Shimano Shadow RD+.\u003c\/li\u003e\n\u003cli\u003eClutch System: Integrated chain stabilizer.\u003c\/li\u003e\n\u003cli\u003eClutch Adjustment: On\/Off switch.\u003c\/li\u003e\n\u003cli\u003eIntended Use:\n\u003cul\u003e\n\u003cli\u003eGravel riding\u003c\/li\u003e\n\u003cli\u003eAdventure riding\u003c\/li\u003e\n\u003cli\u003eMixed-surface cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis derailleur is only compatible with Shimano 10-speed shifters that use the GRX RX400 \/ Tiagra 4700 cable pull ratio. It will not function correctly with Shimano 11-speed or 12-speed road shifters.\u003c\/strong\u003e\u003c\/p\u003e","brand":"SHIMANO","offers":[{"title":"Black","offer_id":42706933252144,"sku":"IRDRX400","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0272\/9394\/1808\/files\/RD0608.jpg?v=1781187274","url":"https:\/\/movatik.com\/products\/shimano-grx-rd-rx400-bicycle-derailleurs","provider":"Movatik","version":"1.0","type":"link"}