May I ask why your not after the actual rate in terms of unit mass per unit length displacement? That is the only way to calculate wheel rates & thus do any real cross range / platform comparisons?
I have measured all the major company's big bore springs but sadly there was a calibration error on the machine between runs so I can't be 100% sure on the yokomo rates. I am however 100% sure that the Kyosho fronts are a fair bit softer than the small bore equivalents
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