Springs
The spring is (for the most part) wound steel and is defined by its rate.
Rate is a measurement of the force required to compress the spring and is expressed in lbs per inch. For instance a spring with a 100 lbs/inch rate will require 100 lbs to compress it one inch. Each subsequent inch of compression would require an additional 100lbs of force. This is referred to as a straight or linear rate spring. The alternative, is a progressive rate spring which allows a single spring to essentially exhibit multiple rates. By utilizing varied spacing
spring coils, the initial rate may be 100lbs/inch, but each subsequent inch of movement would require more than an additional 100 pounds, and the third
inch would require still more. Progressive-rate springs become stiffer as they
are compressed.
The advantage is a spring that is supple enough to soak up small bumps,
yet firm enough to handle a big hit.

 

 

 

The Basics of Motorcycle Suspension
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