Magura Storm CL Disc Brake Rotor - 203mm Center Lock For Thru-Axle Hub Silver. The Magura Storm CL is a 2-piece disc brake rotor designed for high braking performance at high loads. - Thickness = 2.0mm 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. TECH SPECS Hub/Disc Compatibility Center-Lock Disc Rotor Size (mm) 203 Rotor Type Two Piece