To "pre-load" these springs for greater initial tension, up to 3 spring shims may be used with most of them. However, "Bottoming out" of a spring coil even once will hasten its deterioration so avoid using 3 shims if the "Bottoming out" condition should result.
- A = Pounds tension when compressed to height of 1-1/8"
- B = Pounds tension when compressed to height of 2-3/8"
- C = Rate of tension increased per additional inch of compression