The 1st rate offers an exceptional highway ride and LONG TRAVEL as those coils EXPAND during articulation which allows suspension droop to keep the tires in contact with the ground much longer.
Dual rate long-travel coil spring suspensions offers you the best of both worlds! 07-18 Wrangler JK, 2-Door;Front and rear dual rate-long travel coil springs;Front and rear Nitro shocks;Grade 8 mounting hardware;FMVSS 126 safety tested and proven full compliance;Adjustable front track bar;Extended sway bar end links;Front and rear bump stop extensions;Rear track bar extension bracket;Front and rear eccentric cam bolts for proper caster adjustment;No lower control arms;Pitman arm drop not required;Dual-rate long travel coil springs maintain coil in bucket at full droop;Maximizes articulation;Higher strength alloy over competitors prevents sagging fractures;Allows for powder coating in the OEM coils for superb ride quality;California Residents: WARNING Skyjacker 3.5-4" Dual Rate Long Travel Lift Kit with Nitro Shocks - JK35BPNLT The 2nd rate allows consistent control & stability during heavy off-road suspension movement.. The 2nd Rate, lower coils, only engage when the suspension compresses past the 1st rate.