DVO ProRate Rear Shock Spring - 350/400 x 55mm, Black

Up to 125lbs of progressive rate coil. Great for that big hit support for aggressive riders or linear linkage designs . Lightweight and high quality Japanese steel . Retains spring-rate up to 1,000,000 compressions . Longest spring life of any lightweight steel spring on the market . Available for a 50, 52.5, 55, 57.5, 60, 62.5, and 65mm stroke Jade/Jade X shocks. If you have a 50-55mm stroke shock, get the 55mm spring. If you have a 57.5-65mm shock, get the 65mm stroke spring. If your shock does not have any of the above stroke lengths, the ProRate Spring will NOT workUp to 125lbs. of progressive rate coil; great for big-hit support, aggressive riders or linear linkage designsLightweight and high-quality Japanese steelRetains spring-rate up to 1,000,000 compressionsItem SpecificationsRate (Lbs)350-400Stroke55mm/2.2"