CeramicSpeed OSPW RS Alpha Pulley Wheel System Shimano Dura-Ace 9250/Ultegra 8150 - ALPHA Aluminum Pulley Carbon Cage Silver MFPN=6856 The chain tool is not

The chain tool is not compatible with Campagnolo hollow pin chains

All that and they still managed to remove 83g from the pair

1 Rear Derailleur Pulley Kit and Long Cage Assembly

Elastomer spring suspension for shock absorption

Does not require eyelets for mounting

CeramicSpeed OSPW RS Alpha Pulley Wheel System Shimano Dura-Ace 9250/Ultegra 8150 - ALPHA Aluminum Pulley Carbon Cage Silver MFPN=6856 The chain tool is notCeramicSpeed's OSPW RS Alpha System for Shimano Road Dura Ace R9250 and Ultegra R8150 have been lifted lifted into the future with a distinctly modern and angular design. The updated design brings balance and refinement to the OSPW System allowing it to blend seamlessly into the contemporary design trends of bikes and groupsets making up the whole of which the OSPW RS Alpha System is part. Innovative tech features of the OSPW RS Alpha meets consumer