A leaf spring is a simple kind of spring which is used commonly for the suspension in your vehicle. Leaf springs are very common on vehicles right up to the 1970s. It is noted that leaf springs is even used in the medieval era. However, leaf springs are still used today. They are found in heavy commercial vehicles such as vans and trucks and railway carriages. Heavy vehicles have an advantage of spreading the load more widely over the vehicle's chassis. Leaf springs are designed in two ways—multi-leaf and mono-leaf. Their difference is that the multi leaf is made of several steel plates of various lengths stacked together. While a good example of a mono-leaf spring is the tapered leaf spring. The leaf is thick in the middle and tapers toward the two ends. Leaf springs are made of composite material while others are made of steel. Rancho load leaf spring replaces factory spring packs for a stout 1 inch to 4 inches lift. Rancho load leaf spring will give you the comfortable feel of a ride quality. They are made of rugged steel and are powder coated with Rancho Outlaw Black that helps hinder corrosion. Aside from the additional inch that Rancho load leaf spring gives, it is also suitable for beat-up parts replacement and for providing extra room to fit larger tires or restoring the lift lost after adding a heavy-duty winch or bumper. Rancho products are built to last. So if you're considering replacing your stock springs, consider load leaf springs from Rancho.