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Need help with spring rates and how to compare them

bicketybam

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I am replacing the shocks in my Granite 4x4 3S BLX with shocks from a V3 Typhon. I was able to get the spring rates for each and I was wondering how to interpret them. Here is what I got:

Granite front spring rate: 1N/mm
Granite rear spring rate: 0.85N/mm

Typhon front spring rate: 0.75N/mm
Typhon rear spring rate: 0.56N/mm

Granite uses 500 cst shock oil and the Typhon uses 550 cst

How do these specs compare?
 

Yonic

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I don't think you can compare the shock oils, as the valves and shock body size are part of the equation there as well.
 

bicketybam

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Some more info:

Granite front springs: https://www.arrma-rc.com/part/AR330538
Length is 2.76" Stiffness is 5.71lb/in

Typhon front springs: https://www.arrma-rc.com/part/AR330235
Length is 2.76" Stiffness is 4.28lb/in

Granite rear springs: https://www.arrma-rc.com/part/AR330539
Length is 3.15" Stiffness is 4.8lb/in

Typhon rear springs: https://www.arrma-rc.com/part/AR330239
Length is 3.31" Stiffness is 3.2lb/in

So are the stock granite springs STIFFER than the Typhon's? That doesn't seem right....
 

Yonic

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It can be, since just like in the shock oil, the mounting position and the geometry of the suspension is part of the equation as well. So for example, springs which are half as stiff, but mounted further from the wheel - will cancel each effect out, so the result could be the same
 
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