The SACS is SIGEYI's answer to oversized pulley cages[split]
SACS stands for Single Arm Cage System.
SpecificationsModel: SACS-SHRPulley: 12T Upper, 16T LowerCompatible with Shimano R8000/R8050/R9100/R9150 rear derailleurCassette: Up to 11-34 rangeWarranty: 2 YearsMfr Claim...Read More