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

[David Dunlop]

Phil. Would a Fish Scale help?

Take a good spring, fasten one end to a fixed point and the other to the scale. Extend the spring a given distance and measure the pounds required to do so.

Then compare the other springs, extending them the same distance. You should get different readings if those springs are harder or softer than the one that is your bench mark.

David