Ok its time to put the semantics of this argument to rest .Anyone at Mountune claiming their Springs are linear in the rear are incorrect. Regardless of the supposed tighter winds collapsing and becoming non affecting per HyperCo’s website and the most renowned racing spring manufacturer in the world. Yes they have been tested on spring dynos and have less failure or deflection than any other spring on the market by Performance Shock in Sonoma California by Infineon Raceway. They service Moton JRZ , Penske , Ohlin, Koni, etc.. and are renown in the racing world.
http://performanceshock.com/
Here is the HyperCo link explaining to all who are calling these springs linear read and learn you are not the expert you think you are. Per the pics of the Mountune springs and per HyperCo’s explanation the rears are dual rate which make them a progessive.
You armchair experts can go argue with a Spring Maker with it if you want you are wrong.
https://www.hypercoils.com/tech-tips/linear-vs-progressive-rate-suspension-springs/