With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner. The RD-RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max.
Average weight: 267 g Compatible chain: HG-EV 11-speed/HG-X11 Total capacity: 31T Cable adjuster Fluoric coated link bushings: 4 Low sprocket Max.: 42T Low sprocket Min.: 40T Pulley Teeth: 11T Speeds: 11 Top sprocket Max.: 11T Top sprocket Min.: 11T
