Avid DB3 Hydraulic Disc Brake. The Avid DB3 hydraulic disc brake delivers more control, more confidence, and perhaps most importantly more fun out on the trails. With increased negative volume to combat heat expansion, plus powerful larger caliper pistons, the DB3 brake gives you all you need to up your trail game. A new bladder material reduces air bubbles, ensuring power and consistency on every ride. Bend Zone technology allows the brake lever to flex, saving the body from massive carnage in the event of a crash a crash that would likely break a normal lever. Additionally, Avid's Power Reserve Geometry situates the lever pivot closer to the handlebar in fact, closer than anyone else in the industry. The resulting lever movement has less inward travel, an arc that's closer to your fingers' natural motion and delivers more force to the brake.