CeramicSpeed OSPW Pulley Wheel Aero Alpha System Shimano 9250/8150 - Coated Races Aluminum Pulley Carbon Cage BLK MFPN=00.4118.026.000 and 16 clicks of rebound

and 16 clicks of rebound adjustment

Hardware is all stainless steel and pre-installed for hassle free mounting

be sure that there is some padding between that hard item and any external hard surface like a saddle rail or the B-RAD Mounting Plate

The matching front hub for 350 Ratchet DEG and 350 Ratchet rear hubs

Body is CNCd from a solid billet of 6061 aluminum

CeramicSpeed OSPW Pulley Wheel Aero Alpha System Shimano 9250/8150 - Coated Races Aluminum Pulley Carbon Cage BLK MFPN=00.4118.026.000 and 16 clicks of reboundThe CeramicSpeed OSPW Aero ALPHA system for Shimano 9250 8150 derailleurs updates the fastest proven aero derailleur cage to include CeramicSpeed's patent pending ADR bearing protection and quiet performing ALPHA disc with composite tooth profile pulleys. Furthermore a speed defying pinstripe graphic has been added for a splash of visual motion. Largest Cog 34 Fits Model Ultegra 8150 Fits Brand Shimano Drivetrain Speeds 12 Defined Color Black