WHAT IS ROLL CENTRE ?

While a vehicle corners, the movement of suspension is focused on the intersection of the lines extended from the upper and lower suspension arms. The intersection between the line from where the wheel contacts the road to the instant center (Point A) and the vehicle body centerline is the roll center (Point B). With the stock suspension, the appropriate roll centre has already been set from the factory.

ROLL INCREASES AFTER LOWERING?

Simply lowering the car results in an increase in the distance between the center of mass (Point A) and roll center (Point B) of the vehicle, even though the center of mass has dropped. When the distance between Point A and B increases, roll stiffness decreases, causing an increase in the amount of roll. The amount of roll can be controlled with the use of stiffer springs, but ride quality etc. suffers as a result. Cornering speed does not increase like originally thought.

ROLL CENTER ADJUSTED!

With the Buddy Club Roll Centre Adjusters in place, the angle of the lower arms is revised. Roll centre (Point B) is once again close to the centre of mass (Point A) of the vehicle. With the lowered centre of mass and increased roll stiffness, the limit of cornering speed increases.