Suspension Rubber Helper Spring KitSuspension Enhancement SystemSuspension Enhancement System; Weight Capacity 8600 lbs.; Rear;SPECIFICATIONS:Usage: Medium Duty TruckPosition: RearAxle Style: NAFEATURES:Eliminate Suspension Sag And Cushion Road ShockReduce Sway And Improve Roll StabilityEasy To Install With Basic Hand ToolsImproves Roll ControlTrouble And Maintenance FreeSatisfaction Guarantee And Lifetime WarrantyLeader In The Snow Plow IndustryLeaders In Rubber Spring Technology Since 1965Timbren Suspension Kits (SES Kits) are designed to enhance the suspension of your vehicle. Easiest to use: Rubber cushions absorb road shocks and automatically adjust to uneven loads or road conditions. Easiest to maintain: There are no airlines or fittings to allow leaks. Simply bolt the kit on and you are set for a lifetime of trouble free suspension.Easiest to install: There are no holes to drill, no airlines to route and SES Kits can be installed in a matter of minutes using basic hand tools. The softer ride quality of todays trucks and the mediocre suspensions found on most trailers can cause excessive trailer sway, instability and suspension settling.Timbrens high performance suspension packages will ensure added safety and peace of mind.Timbren Industries is a dynamic corporation producing Aeon(R) Hollow Rubber Springs. Since 1968, we’ve been producing quality ride control products and suspensions. Utilizing the latest technology, Timbren uses computer-assisted design and manufacturing processes to produce quality ride control products for today’s market. Timbren is registered ISO9001:2000. These ISO standards ensure that consumers will always receive quality products from Timbren. Our core product, the Aeon(R) Hollow Rubber Spring, is world-renowned for an efficient, reliable suspension system. Many manufacturers, including Bombardier, Mack and Kenworth, directly utilize Timbren kits in their commercial products. Many other fleets, modifiers and converters install th