Shimano XT BR-M765 Disc Brake

"Completely redesigned, the new XT disc brake borrows the innovative technology that made the XTR version so great. By replacing the old caliper with a new super-lightweight and rigid one-piece caliper you get quick all-weather braking with less bulk. The new Center Lock rotor and shimless caliper mounting simplifies installation, to get you on the trail faster with fewer hassles.Caliper Wt.: Front 163g/ Rear 170gRotor Wt.: 149g (160mm)Center Lock rotor works w/ HB-M965 & HB-M765 hubsFluid Type: Mineral OilCompatible w/ both International Standard & Post-Type ForkSpecify front or rear"