Campagnolo Chorus Rear Derailleur - 12-Speed Model=No.9 50d Rim XD driver body creates more

XD driver body creates more stable hub connection

Color Black Defined Color Black Front Axle 3/8" x 100mm Hub/Brake Compatibility Rim Brake ISO Diameter 406 / 20" BMX Tire Type Clincher Valve Schrader Wheel Size 20"

Typically shorter offsets are more stable but require more steering input to change direction

}Shimano BL-MT200 Replacement Right Hydraulic Brake Lever without Caliper Black

}Schwalbe Green Marathon Tire - 27

Campagnolo Chorus Rear Derailleur - 12-Speed Model=No.9 50d Rim XD driver body creates moreThe Campagnolo Chorus 12 speed rear derailleur features 3D Embrace technology and 12 tooth pulley wheels making it suitable for all cassettes as the distance stays optimum on each individual sprocket regardless of the cassette selected. Embrace technology not only keeps the rear derailleur vertically aligned in the perfect position for each sprocket it now makes the upper pulley wheel advance perfectly in the direction the bike is advancing On rough