320mm OD. Open center; 160mm. Thickness 4.5mm. 5 x 15mm x 15.7mm elongated mount holes. Mount to mount hole distance 113mm. Mount style ''N''. - Stainless steel - Outer diameter 320.0 mm - Inner diameter160.0 mm - Thickness 4.5 mm - Number of holes 5 - Hole diameter15x17 mm - Pitch 193.0 mm - Rigid disc - Turning direction Omnidirectional - OEM replacement reference 41500158A. All Moto-Master brake rotors are manufactured from premium stainless steel; offering superb braking ability and are highly corrosion resistant. CNC machined; laser cut and precision double grinded within the tightest tolerance to eliminate any brake rotor vibration. All Moto-Master brake discs are made in Europe and approved. Note: Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.