Weight: Shimano SM-RT51 180mm Rotor

The actual weight of Shimano SM-RT51 180mm (7") rotor (with words "RESIN PADS ONLY" on it's side) is about 170gr (0.38lbs). The thickness of my rotor is about 1.9mm - it is a little bit used. I've been using this rotor with sintered (metal) pads with Avid Elixir CR Carbon for about 1000km on a back wheel of my trail bike. I don't have any problems using this "resin pads only" rotor with sintered pads, and I will use it until it will be weared out.