The M987 Race Disc brake is light. Shimano has redesigned it to produce great weight savings, along with a new rotor design for better heat dissipation. Weight savings are 40g per brake compared to the previous XTR Race M985. Top of the line and super light, the M987 is Shimano's lightest hydraulic disc brake to date.
These are great brakes but you're going to need rotors. Choose from our extensive selection of disc brake rotors here.
Very easy to set up. I had to cut them and run them through my frame(rear brake) and didn't have to bleed. Plenty of power for XC, light AM with 160s.