An increased diameter vacuum assisted tandem booster gives reduced pedal effort though relatively firm braking feel ( see graph ).
2.
The brakes were typical of an Audi, which is to say they are quite sensitive to pedal effort _ I like that _ but still easy to control.
3.
A Vacuum Servo also known as a power booster or power brake unit uses a vacuum to multiply the drivers pedal effort and apply that effort to the master cylinder.
4.
Tactics are based on the aerodynamic benefit of drafting, whereby a rider can significantly reduce the required pedal effort by closely following in the slipstream of the rider in front.