SUB009BBKG1
Medium Load: 0-110lbs front and 0-440lbs rear (normal driving weight)
Spec C Heavy Load: 110-176lbs front and 660+lbs rear (extra driving weight)
The Spec-C heavy-load springs are designed for vehicles that are constantly loaded with a minimum additional weight of 660lbs in the rear and 110-176lbs upfront.Such as roof top tents, and other heavy items constantly loaded on the vehicle.
Product is great shipping was fast only thing that can be changed inform customer of shipping and tracking had no ideal till it showed up at my house ..