Corner Weights are the individual static vertical loads carried by each of the four wheels, measured with the car on a set of four scales. From them come the front-to-rear and left-to-right percentages and, most importantly, the cross weight, which is the sum of the right front and left rear expressed as a percentage of the total. Cross weight determines whether the car behaves identically turning left and turning right, and on a road course the usual target is fifty percent so the handling is symmetric. Corner weighting is performed at the intended ride height, with the driver’s weight and the intended fuel load represented, the anti-roll bars disconnected so bar preload does not corrupt the reading, and the suspension settled between adjustments; it is adjusted by changing spring perch heights, which redistributes load diagonally rather than changing the total weight.