Q: Are the DUAL RATE LINEAR LOWERING SPRINGS linear or progressive?

Neither. It is a third category. The dual rate nature of this product is a direct descendant to motorsports “stacked’ spring setups. A stacked spring is two linear springs of differing spring rates and lengths that are stacked together with a predetermined location for a transition point between spring rates. This strategy employed on high end motorsports suspensions provides predictable results yet allows advanced tuning of handling characteristics by using two independent linear spring rates. The dual rate spring we offer is of equivalent concept. It employs two specifically engineered linear spring rates with a specifically located transition point between the two rates. Therefore, it is more linear spring than progressive spring in nature, yet is a third category.