I just found there is a Technical Bulletin on the TRP HYRD Disc Brakes.
HYRD TRP owners who received and have these installed on their bikes starting from June 01, 2013 to the current date should check the adjustment of their brakes! Brakes improperly adjusted are potentially dangerous.
The technical BULLETIN READS AS FOLLOWS:
"The HYRD brake system is an open hydraulic brake designed for use on single rider bicycles. The purpose of the open hydraulic system is to allow the pistons to compensate for pad wear. Each time the brake is released, the piston opens up the reservoir, allowing more oil into the caliper if needed. Only a properly set-up brake will allow the piston to retract fully ensuring that your brakes can account for worn pads.
To check if your brakes have been set-up and are operating correctly, examine the Lock Knob feature next to the cable actuator arm. If the Lock Knob can be threaded into arm, then this means the actuator arm is in the correct position and the hydraulic system is open. If the Lock Knob will NOT thread into the actuator arm or is very difficult, this means that the actuator arm is preventing the piston
from returning fully and has closed off the reservoir port. This prevents the brake to compensate for pad wear.
To remedy this - follow the cable installation and adjustment instructions in the HYRD Owner?s Manual. DO NOT RIDE A BIKE WITH A BRAKE IN THIS CONDITION IT COULD CREATE A POTENTIALLY DANGEROUS SITUATION, PARTICULARLY WITH WORN PADS. The barrel adjuster is intended to fine tune cable tension to take up cable slack that some people find difficult to remove when installing the cable. The barrel adjuster has a 1.5 turn limit before the system is closed off. When using the barrel adjuster, check that the Lock Knob will still thread into the actuator arm (with a brake lever in the released state.)"