# Disk Brakes - Force and Torque

## Force and torque by activated disk brakes

The torque capacity of a disk brake with two pads can be expressed as

*T = 2 μ F r (1)*

*where *

*T = braking torque (Nm)*

*F = force on each pad (N)*

*r = mean radius (from center wheel to center pad) (m)*

Required pad pressure can be expressed as

*p = F / A (2)*

*where *

*p = pressure (Pa)*

*A = pad area (m ^{2})*