Shimano CAMBIO GRX RD-RX812 11-Speed Shadow+

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.Adjustable chain stabilizer prevents chain slapping & dropsSmooth and reliable mixed surface shiftingCompatible with current road dual control leverTop sprocket: Max. 11T/Min. 11TLow sprocket: Max. 42T/Min. 40TTotal capacity: 31TWith 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 an ON/OFF switch for the chain tensioner. Its compatible with current road dual control lever and gives you precise shifting every time.