Posted 14 April 2011 - 06:55 PM
They improve 'turn-in' so that on a totally smooth surface you can get back on the power earlier.
For rallying they do tend to make the car 'twitchy' on bumpy straights or long fast bumpy corners where the Mini is at a disadvantage compared with longer wheelbase cars already.
Increasing the roll stiffness at the back will increase the road-holding at the front to the detriment of road holding at the back.
Good for racing and hill-climbing, but not really much use for rallying.