Coil Spring Tuning Basics
With the launch of the new Yeti SB165 we’ve had a lot of questions. Here we go with some Coil Spring Tuning Basics.
Some very basic principals to start with here.
Coil springs are rated by the weight that creates an inch of spring compression. So a 400lb spring requires 400lbs to compress the first inch and would take 800lbs to compress two inches. However, coil springs are not produced to “exact” standards. That is to say if a coil is offered in say 50lb increments ( example: 350, 400, 450) 400lb spring may actually we anywhere from 376 to 425lbs. That’s a pretty wide range and most quality spring manufactures will have a slightly tighter tolerance, but that’s the concept.
Coil springs are also measured by total length as well as available stroke. Running a coil that is too long or short in either measurement can create problems.