The reach on Radius hydraulic brake levers on Zulu Series can adjusted without tools.
To decrease the distance between the brake lever and the handlebar turn the reach adjustment knob counter-clockwise
To increase the distance between the brake lever and the handlebar turn the reach adjustment knob clockwise
Whenever adjusting brakes, check to make sure the brakes function properly before the bike is ridden. Make sure the brakes can be fully actuated.