Here are some pre worked out spring rates for the rear shock for road use on a Firestorm So what is a Spring Rate? A Spring rate is the number of kg or Newton needed to move the spring by 1 mm (or inch if you use lb rating). To get a kg rate of a spring for a listed Newton force simply divide the Newton Force by Gravity So ideal spring for me Solo would be 170N so very happy with the 170-175 spring, So in this case the Acceleration is the Gravity which is 9.8 m/s. You can get the Newton force by multiplying the Mass and the Acceleration.
Recommended Shock Spring Rate (for me 14 stone): 17.3 kg/mm (use closest available)
I came about this trying to find out about my shock, i thought i had been sold a WP shock that was for a rider 170-175 kg in weight as that was what was stamped on the spring 170-175, thankfully Al pointed out to me that i was incorrect in thinking it was kg rating it was infact the Newton Force rating of the spring, so to anyone that has a got a shock second hand and doesn't know what spring is on it this may be of some use?
