When the brake pedal is pressed, hydraulically pressurized fluid is forced into the cylinders, pushing the opposing pistons and brake pads into frictional contact with the disc. The advantages of this form of braking are steady braking, easy ventilation, balancing thrust loads, and design simplicity...
Hub: The wheel spins around the hub that sits at its centre. On the rear wheel, the hub features a freehub mechanism (unless you’re riding a fixed-wheel bike), which allows the bike to coast, but drives forward as desired when you pedal. The hub contains the bearings that the axle...