Join Date: Dec 2004
Location: Sydney, Australia
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Never gas on top of gas.
Why would Showa use X spring rate? Why WP Y rate? Why Penske Z rate? And Ohlin's another again? Therein lies the stupidity of any spring calculator basically...
I think with some shock brands you might use a 9.2 kg/f (90N) rate, if you were really light - most of this being empirical for me, as I am light!
Both the Blade & the 600 use heavier than a lot of after-market brands; but this is for their shock design. Not them getting it wrong, as such. Which is to say, change brands, or more to the point, fluid control from design architecture/theory, and the spring's rate cannot be the same - this has been the whole point of the last 35 years of shock changes - internal features - , and now entire ideas have been swapped about and actually come a full circle if we want to include 1960's F1 shocks in this!
So no, I do not subscribe to calculators. A waste of prerequisite knowledge.