Brake torque is used as a measure when it comes to braking performance. To keep things simple, imagine driving a high powered FWD or RWD vehicle where all of the power is transmitted to only 1 axle. What happens? We get massive wheel spin, loss of traction and reduced distance travelled. Similarly, if we have too much brake torque on 1 axle, we get too much force at the front of the vehicle, resulting in a nosedive! This also potentially leads to longer overall stopping distances due to front and rear tyres not sharing the brake load proportionately.