USR Series Sport Slotted Rotor. USR Series Sport Slotted Rotor; Rear; For FMSI Pad No. D272; Solid; 5 Bolt Holes; 258mm Dia.; 46mm Height; 9mm Thick; 68mm Center Hole Dia.;. Choose from EBC plain non drilled rotors or sport rotors in two choices - wide aperture 3GD series for cooler running or new SUPER SILENT Ultimax USR slotted series.