1 finger space in between the guards imo, :P but its totally up to you, and how steep your apartment carpark ramps are, thing is there, is that the springs will settle and sag so if i go 1 finger initially i'll end up rubbing guards and most likely bottom out. anyone else on 17's have suggestions for initial setting? lol, dude your wheels are 17x7 +45, you wont scrubbing anything but dishes...