Studio : Shimano Publisher : Shimano Binding : Sports Product Description Great value Deore 2-piece design chainset for 9-speed transmissions;The 2-piece design chainset features an external bottom bracket system which is a lightweight rigid design;Lightweight and rigid steel bottom bracket axle;SG-X chainring with patented spike pins give smooth and fast gear shifts under load;Lightweight aluminium outer with steel middle and inner chainrings 0
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