The Differences Between Mechanical and Hydraulic Disc Brakes: Hydraulic Disc Brakes have Hydraulic systems work with fluids. This type transfers force from the lever to the caliper, giving you a greater braking or gripping power level. Hydraulic systems work with fluids and transfer force from the lever to the caliper, giving you a greater braking or gripping power level. They offer maximum braking power that you can easily control. Compared to hydraulic disc brakes, mechanical disc brakes are quite basic. They are also known for being lightweight, which vouches for comfort and stability on your trip. In terms of budget, I recommend this brake type as they are way cheaper than others.