Clarks exo hydraulic disc brake setclarks exo hydraulic brake is a lightweight and compact 2 piston hydraulic brake the brake offers good all round stopping power that is at home on some of the most demanding terrains this brake feature reach adjustment so that lever blade position can be changed in relation to handle bar they also feature bite adjustment that allows the rider to set the brake up to suit their exact needs and riding style features 2 piston hydraulic caliper provides great st