Clarks m2 hydraulic disc brake rotorapart from still using an opposed two piston design the new m2 brakes hold very little in common with previous stoppers from clarks aesthetically for the lever at least comparisons can be made between the new m2 and many of shimanos recent models the lever size and shape look familiar and so does the way the raised master cylinder runs parallel with the hose what mountain bike review specifications power figure of112nm rotor size160mm or 180mm