No bike shop can go with out Dia Compe. The Japanese brand have been making brakes and other accesories since 1949. Their products are tried and true and great value, also being a Japanese brand they make great looking products also. Rear: MELT FORGED ALUMINUM ARMS. POWER REINFORCEMENT WITH DUAL-PIVOT DEVICE. DIMENSION 57-75MM, COLOR: SILVER FINISH. 1WHEEL/BOX Lightweight forged alloy Power reinforcement with dual-pivot device Deep drop 57-75 mm Color: Sliver Front or rear versions available Weight: 210g = 7.1(oz) 1 year Warranty