zoom DB680 Road Bike Bicycle Alloy Disc Brake Mechanical Set Front & Rear Includes 160mm Axle Rotor Spyre Finally a mechanical disc brake that offers superior performance and is a breeze to install. The 680 zoom is a double sided mechanical mechanism where both blocks work while still providing precise clamping force. This results in even pad wear and with a simple barrel adjuster the pad can be adjusted easily and without hassle. No more frustration of having to completely adjust the entire stirrup only to have it continue to slide on the fixed side causing additional wear! -dual control surface. -even wear pad -Easy adjustment and setup -Works with ALL cable operated road levers. We highly recommend a compressionless housing. -Composite works well in dry conditions but can wear out quickly in wet/muddy conditions