Oliver, I don't think that the units are lb/in.
The reason being that on the track when I used to run a fireblade an associated slver front spring which felt slightly stiffer than an (2.5 rate) schumacher red, but softer than a schumacher grey (3.0 rate).
The associated springs are 3.85lb/in according to their website and your chart., which woud make them much harder than the above schumacher springs if the schumacher rates are in lb/in.
Btw I'm talking about the old style schumacher springs which do not he quite the same rates as the ones you have listed.
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