MRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight

MRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight. Progressive Springs utilize a non-linear design intended for trail and all-mountain/enduro riding. They are designed to increase in rate late into stroke to provide additional bottom-out support and open up the use of coil shocks on frames previously only suited to air shocks.