SRAM Red WiFli Rear Derailleur - 11 Speed Medium Cage Black ModelNumber=K9849 hanger # 648

hanger # 648

TH Brand 36 degree Angular Contact sealed bearings

and all 12

Super wide 10-42t gear range is a perfect fit for any ride

StrapAdjustable Straight Strap

SRAM Red WiFli Rear Derailleur - 11 Speed Medium Cage Black ModelNumber=K9849 hanger # 648SRAM Red WiFli Rear Derailleur 11 Speed Medium Cage Black. Top of the line rear derailleur with generous use of carbon fiber and titanium for maximum performance at minimal weight. Carbon fiber and aluminum construction Ceramic bearing pulleys Titanium hardware TECH SPECS Rear Derailleur Mount Type 10x1 Standard Rear Der Shifter Compatibility SRAM Exact Actuation Cage Length Medium Drivetrain Speeds 11 Weight 152 Color Black keyword search RD4621