little ride height help?
 

this seems really simple mabey I am over thinking it? If I want to raise my ride height one milimeter to gain some ground clearance. or even just for tuning am I better to just crank down the collars or just go to a little heavier spring? just another tuning option?

you have the right idea, move the shock collar.
Moving it down will put more pressure on the spring raising the car up and vice versa. If you have to move the collar so far down that the spring is compressed quite a bit than you would want to change to a harder spring. Moving the collars is a minor adjustment whereas changing the spring would be more major in relation to how quickly the shock "reacts". Do a search in the offroad section for suspension set-up for some better info than I can give:ha:

didn't notice you are running an onroad car but it's the same idea. Check our redrc.net there are some really great set-up videos for on-road shock building, diffs, ride hight, droop, very informative www.youtube.com/watch?v=wRufP_X9K3g

the shock collars are for adjusting ride height, that's their sole purpose.
changing to a heavier spring just means a stiffer ride, though they still have to have their rideheight adjusted too.

ride height will also effect traction on and off power so does moving to a heavier spring rate on the springs. But many things can change traction, diff setting, shock mounting, tires and inserts etc.

i agree with yall.