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.