Piston brake caliper and brake system

A disk brake system, the system comprising:

• a brake rotor comprising:
• a hub configured for attachment to a vehicle,
• a first and a second contact surface, and
• a web connecting the first and second contact surfaces to the hub;
• a first and a second brake pad located adjacent to the respective first and second contact surfaces of the brake rotor, wherein the first and the second brake pads are configured to press on the respective first and second contact surfaces of the brake rotor during operation of the brake system;
• a first brake piston configured to push the first brake pad against the first contact surface of the brake rotor during operation of the brake system;
• a parking actuator comprising:
• a nut in communication with an interior of the first brake piston,
• a spindle in threaded communication with the nut and configured to be rotatable, and
• a parking brake rotator configured to rotate the spindle in relation to the nut;
• a second brake piston opposed to the first brake piston;
• and
• a pad adjustor in operational communication with the second brake piston, the pad adjustor comprising:
• an adjustor spindle, and
• an adjustor nut in threaded communication with the adjustor spindle,
• wherein upon operation of the brake system in a first operation mode, the first brake piston moves the second contact surface toward the second brake piston by deflection of the rotor at the web.