Progressive Rate vs. Linear Rate Springs - Many customers ask what the difference is between Progressive and Linear rate springs. A linear rate spring has a constant spring rating, no matter how much the spring is compressed, for example 600lb/in. This means that for every 600 pounds of pressure, there will be 1 inch of spring compression. A progressive rate spring will have a variable spring rate, for example 425-630lb/in. This means that it may take 425 pounds for 1 inch of compression, but as the spring compresses more it will rise to as much as 630 pounds of pressure. To put it simply, the spring "progressively" gets stiffer as it is compressed. While this is all sounds good, what does it actually mean? Read on below to find out more. Advantage of Progressive Springs
. We believe a progressive rate spring is ideal for owners who use their Mustangs as daily drivers who see a lot of "spirited" driving. A progressive spring is comfortable and offers excellent manners during normal driving condition. Once you put the pedal down and take a corner at a higher rate of speed, the spring compresses and offers much firmer handling characteristics. The upside to this is that you can install a lowering spring that will lower your vehicle for great looks and offer excellent handling when needed. Under regular driving, the feeling of your Mustang's suspension will be similar to the stock springs. Some of our most popular progressive rate springs are shown below.