Progressive vs Linear Springs

[Pitt Yaris]

What shape determines what? Wouldn't most lowering springs *non coilovers* be linear since they post their rates, etc?

[Jeemee]

Originally Posted by Pitt Yaris

What shape determines what? Wouldn't most lowering springs *non coilovers* be linear since they post their rates, etc?

You can tell by the spacing and width of the spring. If the spacing and width are the same between every coil then it's most likely linear. If the spacing and width vary between coils then it's most likely progressive. Some coilovers have two linear springs of various spring rates. The soft spring rate spring is often a short spring, just a few centimeters tall usually.