progressive VS linear springs

[glitched]

When I asked Tanabe if their gf210 springs were progressive or linear, they replied with "both"

progressive coils are wound closer and provide comfort and tractionlinear coils are the majority and arent wound as closely as the progressive.

"The GF210’s for the S13 240SX have some progressive coils for ride quality, but the majority of the spring is linear rate. Progressive coils are at a softer rate and are closer wound and provide higher comfort and traction over small bumps and road irregularities, where a purely higher rate linear spring would bounce over them. The GF210’s is a balanced spring for handling, where the higher linear rates of the majority of the spring are utilized during aggressive cornering, and the softer progressives coils maintain daily drivability."

So my question is, Is this a general rule of thumb for ANY spring?

[hannibal]

I think their complex explanation describes any PRGORESSIVE spring.

The term progressive doesnt imply that the rate at which the spring rate changes to be constant. Linear means the rates are the same thru any amount of compression. Pregressive means they change. So even if the rates change thru the first xx inches of travel, then remain constant during the last few inches, its still progressive, not prog. and linear.