The most powerful rotors in Magura&';s portfolio Optimized for E-Bike but excellent for other demanding applications, DH for example Two piece design featuring Dovetail Interlink Technology, a patented interlocking of the outer and inner rings. Interlocking provides additional support when the outer ring expands due to heat Magura rotors utilize a 2.0mm thickness for optimum performance Not compatible with Center Lock adapters 6-bolt rotors include: (1) 6-bolt/44mmBCD rotor with (6) T-25 rotor mounting bolts If your new rotors are a different size than the ones you&';re replacing, then you&';ll need new brake adapters! Check out our guide to getting the right brake adapters to spend less time on the computer and more on the trails.