I have been looking at coilovers for my 2006 MCS GP and I have a general question about spring rates. Many coilover setups have a higher spring rate in the rear than front, such as 7 kG (392 lb) in the front and 8 Kg (448 lb) in the rear, which seems backwards to me because the front has 60% of the vehicle weight. If I use some of the spring rate calculator programs I come up with something more like 7 Kg (392 lb) in the front but something more like 4.5 Kg (252 lb) for the rear for my Mini Cooper. Why do most coilover setups have such a high rear spring rate 450# verse the expected lower 250# when using 400# in the front? I have a couple theories but could be all wrong so I would like your inputs: 1. Just trying to stiffen the rear end to reduce understeer and assuming a stock size rear sway bar and no front camber plates. 2. If the car has a large adj rear bar, such as 22mm solid, and front camber plates (-2 deg or more) the rear spring rate could be closer to the 250# range.