Hydraulic disc brake calipers are available in either stainless steel for maximum salt water corrosion resistance or Dacromet™ coated cast iron. Both styles are fitted with special pistons that will not rust.

The simplicity of hydraulic lines connecting multiple calipers makes this style of caliper suitable for installations where more than one axle is used. Trailers with loaded weights exceeding 2000 kg require independent control and breakaway facility, causing the brakes to automatically be activated should the towing vehicle and the trailer become accidentally disconnected. Hydraulic disc brakes used with a simple system such as the IQ7 fulfil this legal requirement. Hydraulic calipers can also be operated using hydraulic over ride couplings for trailers under 2000 kg GTM.

Hydraulic calipers are suitable for disc hubs and rotors of thicknesses of 15mm. Left hand & Right hand calipers are achieved by swaping the bleed screw and fluid line in positions, the bleed screw should always be on the highest port of the caliper.