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 activate should the towing vehicle and the trailer become accidentally disconnected. Hydraulic disc brakes used with a simple system such as the Sens-a-Brake fulfil this legal requirement. Hydraulic calipers can also be operated using hydraulic over ride couplings.
Hydraulic calipers are suitable for disc hubs and rotors of thicknesses from 12mm to 15mm.
