The revolutionary Progressive springs fit shocks of any length with 50 - 65mm of stroke. Progressive springs increase ending-stroke support by approximately 20% over linear coil springs - allowing them to be used on frames previously requiring the progressive nature of air suspension.
Effective rate - 350lb
@ 25% Sag - 350lb
@ 90% Travel - 375lb (51mm stroke) - 400lb (55mm+ stroke)
Effective rate - 400lb
@ 25% Sag - 400lb
@ 90% Travel - 450lb (51-60mm stroke) - 475lb (63mm+ stroke)
Effective rate - 450lb
@ 25% Sag - 425lb
@ 90% Travel - 500lb (51-60mm stroke) - 525lb (63mm+ stroke)
Effective rate - 500lb
@ 25% Sag - 475lb
@ 90% Travel - 575lb (51-60mm stroke) - 600lb (60mm+ stroke)
Effective rate - 550lb
@ 25% Sag - 525lb (51-60mm stroke) - 475lb (63mm+ stroke)
@ 90% Travel - 650lb (51-57mm stroke) - 675lb (60mm+ stroke)
For further technical information please check MRP's website out.
Please note for use on non-MRP brands you will need a spring spacer kit due to the overall length of the spring, they can be found here. Please see the geometry tab below for which spacer kit you need for non MRP shocks.