Got this from Madeno (when I was looking at lowering springs): SPRING RATES
The OEM factory front springs of the Clio RS are progressive, the rear springs are linear!
our front and rear springs are both progressive and will give the car a better balance,
handling, more comfort at lower shock speeds and reduces the body roll !
Spring rate OEM Clio RS factory front springs: progressive 28 N/mm up to 40 N/mm
Spring rate OEM Clio RS F1-R27-Cup front springs : progressive 40 N/mm up to 60 N/mm
Spring rate Madeno Racing springs Clio RS : progressive 32 N/mm up to 50 N/mm
Spring rate OEM Clio RS factory rear springs : linear 48 N/mm
Spring rate OEM Clio RS F1-R27-Cup rear springs : linear 67 N/mm
Spring rate Madeno Racing rear springs : progressive 45 N/mm up to 62 N/mm
Together with our springs we also want to recommand another kind of bump stops
for the front axle, the original bump stops are too stiff, the car will hit the original front
bumps under (hard) braking.
The front suspension block too easy at the stiff OEM front bump stops and the rear of
the car becomes very twisty in the mean time.
