1 x ROTOR SMRT66 6 Bolt 160mm, Reliable and easy anti-loosen plate, Metal pad compatible Stainless steel braking surface improves pad clearing in muddy conditions while aiding cooling under high load, Fitment varies from IS (International Standard) 6 bolt to Shimano's new Centre Lock splined, common for rotors to be different sizes from front to rear, with the front usually having a rotor one size up from the rear
