Jiobapiongxin ZTTO 11 Speed Cassette 11-50T Compatible Bike High Tensile Steel Gold Gear Price: $81.90 (as of 17/04/2019 23:43 PST- Details)

High quality dyna-sys 11-speed cassette 11-50 teeth
Close ratio gearing allows a more efficient use of energy through finer cadence control
Sprockets are cut away and drilled to reduce weight without reducing rigidity