Competition rated rubber spring for use on ROAD OR RALLY Minis.
These uprated springs do not feel much harder or give a harsher ride, but were specially developed to give a more compliant and supple performance by way of careful re-arrangement of the spring rate. Basically less body roll with a better working rubber cone that does not tail off as quick in spring rate under use . You will need an adjustable suspension ("hilos") with these as they sit higher and although settle a little, you will want to adjust ride height over time.
For hard cones for racing, see C-STR688