Maximum rear wheel spacer vs. safety issues

[Sean Marconette]

The key to running spacers is what Larry pointed out. They need to fit snug on the wheel stud, and have adequate torque applied. The 5/8" studs do not allow for a shoulder style lug nut. The problem with running spacers with 1/2" studs, is the engagement of the lug nut shoulder allowing flex in the stud. If the stud is allowed to flex, you will have bad things happen. After having 4 out of 5 wheel studs break when I first got my car back together several years ago, I was running 1/2" studs with spacers. The stud was flexing at the brake rotor hat, as the lug nut shoulder did not engage in the full depth of the spacer. Since switching to 5/8" studs and billet spacers, I have never had an issue. When servicing the brakes, I have to work the spacer off the studs to remove them.

Get the tire and wheel to fit the car with spacers, then if you choose to buy a custom offset wheel you know exactly what you need.

Sean