Shimano RT-EM300 203mm Disc Rotor w/ Int + Ext Serration Lock Ring

Shimano Steps - Center Lock - Disc Brake RotorShimanpo RT-EM300 disc brake rotors for speed sensor systems provide exceptional stopping power in all riding conditions. Shimano's Center Lock mounting system makes installing and removing rotors quick and easy thanks to the spine mount and lock ring design.
Technical SpecificationsCenter Lock disc brake systemWide type disc brake rotorNot compatible with metal brake padRecommended Brake kit: MT520/MT500/MT420/MT400