Shimano Deore SM-RT64 180mm Centerlock Disc Brake Rotor

Shimano's centrelock mounting system makes installing and removing rotors quick and easy due to the spine mount and lock ring design and this Deore SM-RT64 rotor will deliver powerful and consistent braking performance in all riding conditions.
Centrelock The Centrelock system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.