MRP Suspension Black 134x65mm 450-52 Progressive Spring

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.

Technical information: 

RSMRS201
Effective rate - 350lb
@ 25% Sag - 350lb  
@ 90% Travel - 375lb (51mm stroke) - 400lb (55mm+ stroke)

RSMRS202
Effective rate - 400lb
@ 25% Sag - 400lb
@ 90% Travel - 450lb (51-60mm stroke) - 475lb (63mm+ stroke)

RSMRS203 
Effective rate - 450lb
@ 25% Sag - 425lb
@ 90% Travel - 500lb (51-60mm stroke) - 525lb (63mm+ stroke)

RSMRS204 
Effective rate - 500lb
@ 25% Sag - 475lb
@ 90% Travel - 575lb (51-60mm stroke) - 600lb (60mm+ stroke)

RSMRS205 
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.