280mm (10.2") OD x 5mm thick. Open center. 5 x 8.7mm (5/16") bored mounting holes. Mount hole to mount hole distance 108.7mm. Mount style ''M''. 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. - Stainless steel - Outer diameters 280.0 mm - Inner diameter 168.0 mm - Thickness 5.0 mm - Number of holes 5 - Hole diameter 8.7 mm - Pitch185.0 mm - Turning direction Omnidirectional - Speedometer prepared No - OEM replacement reference 41500159. 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.