by The Roadie » Thu Feb 27, 2014 1:08 pm
With my expedition cargo overload, I eventually sag EVERY spring I put in there. My OEM springs with Airlift1000 bags pinched a hole in one bag on my first trip up the Lippincott Mine Trail in Death Valley long ago. I was on the bump stops way too much. Had to wait for a day in Bishop, CA for Fedex to deliver new bags. I blame my overloading and lumpy trails. Not in any way a criticism of Z71 springs.
IME, you have to match the higher spring rate of either Skyjacker Tahoe springs or the Z71s, with a proper shock, to get optimum damping performance. Z71 springs with Bilstein HD shocks is not a good combo. And adding Airlift1000 bags inside ANY shock changes the effective spring rate.
I even sag front springs every couple of years until I scored a set of 89's, or when I was running the Icon coilovers before they broke.