I am setting up a new Niner Rip 9 with the OE XTR M985 brakes from jensonusa for 170 a wheel and need to decide on rotors to go with them. I have a stans flow ex wheelset for it with 6 bolt hubs so I am planning to use Shimano XT RT86 rotors. I was thinking about running a 160mm rear but split between the 180 and 203 in the front. Does anyone know the weight difference between these rotors? I am only 175lbs but I don't want to compromise on braking if its not too big of a weight penalty. Any other rotors that are better for the same price or less?
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