Choose spring size
(1) Spiral spring diameter (inner diameter)
The dimensions of 2.0 “, 2.5”, and 3.0 “represented by the shock absorber are based on the outer diameter of the cylinder. It is a very common mistake to match the spring size with the same size of shock absorber (did you get hit?). The size of the shock absorber spring must actually be slightly larger than the shock absorber to be compressed and twisted as a coil spring.
The spring size is suitable for different shock absorber sizes, and the editor has classified them for you:
2.0 “suspension using 2.5” coil spring
2.5 “suspension use 3.0” spiral spring
3.0 “suspension using 3.75” coil spring
(2) Spiral spring height (free length)
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When your suspension has a protruding bottom spring tray, it is the most suitable for the suspension travel of your two springs. But if you have a 14 “suspension with a raised bottom spring tray, then you need to choose to install two 14” high springs, which is of course the preferred combination because it will make it very easy for you to run the upper and lower springs at the same time.
For suspension with a flat bottomed spring tray, the lower spring needs to be 2 inches larger than the upper spring to match the stroke of the upper spring. For example, if a flat spring tray is used for 14 inch suspension, a 16 inch lower spring and a 14 inch upper spring can be used.
However, there are still many exceptions to the above rules. If you have more questions, you can contact us.