skywaybuzz said:
Your possible low on NO2 pressure, time for a service. I just put a shraeder valve on my Van. R to recharge the psi cause it was bottoming easier than when it was new.
Hey skybuzz, where did you get a shraeder valve for your vanilla? I've been considering making one (but haven't got around to it) but taps in shraeder size aren't common (although M5 is close).
It's a myth that springs soften. But it is true that a badly made spring can yield, getting a little shorter every time it hits max compression until it's running below the yield point of the material.
But if you increase the preload you keep putting the spring back into the yield point.
The material doesn't soften, the spring rate remains the same but the ride height will decrease.
Measuring the spring (when it's off the shock) is the only way to know for sure.
A well made and specced spring won't have this problem. Car springs are a good example, older cars had sagging problems with age but thesedays the materials are better controlled and it's not a problem.
The spring on my old vanilla (6.75/1.75) was running at 1000Mpa stress at full compression. Fox has some pretty good metal.