12T and 16T R.D over size pulley cage for reduced drivetrain friction

With Cr-Mo steel bearing

MATERIAL : Carbon Cage / AL7075-T651 Pulley
SPEC : Fit SHIMANO® RD 9000 / 9070 / 6800 / 6870
COLOR : 3K carbon
WEIGHT : 60g/set
OPTION : Ceramics ball bearing
Not available in Japan