/ubbthreads/images/graemlins/tongue.gifI worked as a tire monkey for a major national chain for a few years. Wheel spacers=bad JUJU. Thing about wheel spacer is they make a wheel lug centric, and prone to vibratins. Also read, if the wheel isn't mechanically centered on the hub by the center hole, then you are relying on the lugs and studs to center the wheel on the hub. This can be disturbed by the weight of the vehicle(if on the ground) while torquing the lugs. If you do run 'em, I recommend torquing them in the air... As far as studs go, the rule of thumb I was taught: The benefit of the amount of threads inside the lug nut is only equal to the diameter of the stud. So if you have 3/8" studs, then as long as the threads of the lug are on atleast 3/8" you have the full benefit of strength. While I don't buy into the former statment 100%, it does have some merit...