MRP Progressive Rear Shock Coil Spring 124mm Long 65mm Maximum Stroke 400+ 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. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Rear Shocks". The seller is "thebikehubonline" and is located in this country: US.