icecyc1, would it be possible to generalize a rule about correlating shock oil to spring rate? I touched this on my dyno thread, but I thought I'd bring the question to you.

The question is, assuming the piston stays the same, does the ratio between the viscosity of the shock oil and the spring rate have a meaningful relationship that stays constant over the typical range of conditions, like temperature and shock piston type?

If I have a known viscosity oil in my front shocks, and I know my front and rear spring rates, will solving a simple ratio tell me what shock oil I should be using in the rear?

I stumbled on this, and it seems plausible. I found a combination of shock oils that appeared to have matching damping properties, and the math roughly corresponds. (I didn't prefer this combination, but technically it is best.) My slow motion footage shows the mathematical solution appears control front and rear tires the same.

It is interesting to me because normally when increasing shock oil, I will increase both the same amount. But that may not always be right. In my case, I calculated combinations of oils (converted into Losi) based on this ratio:

30/22.5
35/25
40/30
45/35
50/42.5