[Apex Motorsports]

Originally Posted by layjar12

I have read other post on this and most are saying you want a linear spring and if I read correctly yours are a progressive spring. What is the diference and why would some say a linear is better and to avoid a progressive spring?

Here is part of a tech article I wrote that discusses this topic.

Originally Posted by Apex Motorsports

Linear and Progressive Springs

The two categories of springs commonly used in automotive applications are called linear rate springs and progressive rate springs.

Linear rate springs, also known as standard or specific rate springs, are the simplest spring design there is and are relatively inexpensive to manufacture. The spring has a very uniform design from top to bottom with the coils evenly spaced and all the same diameter. The spring is one rate from top to bottom. This has some advantages for performance at the cost of reduced ride quality. You will most often see a linear spring used on coilovers but some stand alone lowering springs do use this design or some variation of it.


On progressive rate springs the size and spacing of the coils varies. Parts of the spring will have tighter coils that are close together and others with have larger coils that are spaced out more. This creates different spring rates in different parts on the spring. The first section is relatively soft to absorb bumps and cracks in the road for a smoother ride but as the spring compresses the rate increases and it becomes more firm. Because it offers the best of both worlds progressive rate springs tend to be the most common type of lowering spring. They do cost more to make so you will pay more to buy them.

If you read posts from people who have installed our springs you will see that besides the stance the other thing they rave about is the ride. You can not achieve that with a linear rate spring. However, on the track having a linear rate spring would be ideal. It all just depends on how you use your car.

Originally Posted by rocashbill

the springs are awesome and the ride is really close to stock. I couldnt be happier with them.

Originally Posted by ST1LE

Have not had a chance to take many pictures, but wanted to post what I had.

The springs truly ride great, and would say in some cases it rides better than stock even!