The most common caliper design uses a single hydraulically actuated piston within a cylinder, although high-performance brakes use as many as twelve. Modern cars use different hydraulic circuits to actuate the brakes on each set of wheels as a safety measure. The hydraulic design also helps multiply braking force. The number of pistons in a caliper is often referred to as the number of 'pots', so if a vehicle has 'six pot' calipers it means that each caliper houses six pistons.
the most common caliper design uses a single hydraulically actuated piston within a cylinder although high-performance brakes use as many as twelve modern cars use different hydraulic circuits to actuate the brakes on each set of wheels as a safety measure the hydraulic design also helps multiply braking force the number of pistons in a caliper is often referred to as the number of 'pots' so if a vehicle has 'six pot' calipers it means that each caliper houses six pistons