Reference: CMP seat back coil spring dimensions

[Phil Waterman]

Hi

But the big question is how do they work, are they comfortable? I've been lucky that two of my trucks came with good seats. But the third the cushions and the back springs were gone. I've tried various readily available springs and have not found any that are comfortable to sit against for any length of time. Generally there is not enough give across the top.

Now how to measure the give of the springs to try and find good

Cheers Phil