Shimano Dura-Ace R9250 Di2 12 Speed Rear Derailleur

12 Speed Di2 Rear Derailleur 

CAGE LENGTH One-Spec
TOTAL CAPACITY 37T
MAX FRONT DIFFERENCE 16
COLOR SERIES COLOR
AVERAGE WEIGHT 215g
MOUNT Direct attachment (conventional)
NUMBER OF PULLEY TEETH 11
SERIES Dura-Ace
GENERATION R9200
MAX LOW SPROCKET 34T
MIN LOW SPROCKET 28T
REAR SPEEDS 12