The ICON Vehicle Dynamics 2007-2018 Jeep Wrangler JK 4.5″ lift rear coil springs are designed for drivers demanding the ultimate in performance and ride quality, while allowing for increased wheel travel (when used with ICON shocks) and the fitment of larger tires. The ICON Jeep JK coil springs provide 4.5″ of rear lift height over stock and feature a dual rate design. The dual rate design allows for a softer initial rate for superb on road comfort and a firmer secondary rate that increases during compression for excellent bottoming resistance and off-road performance. Like all ICON coil springs, they feature a lifetime guarantee against sagging/breakage to produce confidence in knowing that you have the best suspension products available for the 2007-2018 Jeep Wrangler JK.Additional Attributes:GTIN:00840103401522Finish:PowdercoatedSpring Material:SteelSpring Color:BlackGrade Type:PerformanceRear Spring Seat Included:NoRear Spring Rate Type:Progressive Dual RateAAP_UDA_12:EAAAP_UDA_22:1AAP_UDA_4:55California Proposition 65:WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.OEM Wheels & Tires Fitment:YesRecommended Aftermarket Tires:Recommended Aftermarket Tires: 35 x 12.50 (Larger 37 tire packages will fit with minor modifications or aftermarket high clearance fenders, test fitment recommended)Recommended Aftermarket Wheels:ICON Alloys 178.5 w/ 4.5 Backspace / -6mm OffsetExtended Information:Emissions :Emissions Compliance ExemptLife Cycle Status:Available To OrderPackaging:Quantity of Each:1.0Package UOM:EADimension:21.0000 x 13.0000 x 7.0000 inchesWeight:32.0000 PG