Shimano Dura Ace 12 Speed Rear Derailleur RD-R9250 Bottle Cages This expertly engineered component helps

This expertly engineered component helps maintain drivetrain integrity by catching the chain before it can fall off the chainring

and SP-CER-SP15-ACB-L

CLASSIC 3-STRAP CLOSURE

this clamp ensures reliable seatpost retention

Three spring tension settings allow you to customize performance and reduce chain drag

Shimano Dura Ace 12 Speed Rear Derailleur RD-R9250 Bottle Cages This expertly engineered component helpsCAGE 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