Adjusts brake force distribution to maintain optimum braking on all wheels (compensating for weight transfer).

However, band brakes are prone to grabbing or chatter and loss of brake force when hot.

Use of a following tractor can increase the control and brake force available when descending a hill.

The driver can control brake force distribution fore and aft to compensate for changes in track conditions or fuel load.

In doing so it reduces wear and tear and overheating of the driving wheel tyres and brake blocks and enables a continuously high brake force to be applied.