How would I go about determining the exact specs (backspace, ofset, etc.) of a wheel that I have. I need to replace on of my ROH RT wheels that was damaged by a hit-n-run driver last week. I am not the original purchaser of these wheels so I dont know the specs. I want to be able to order the correct wheel.

If it helps, it's a ROH RT for the front of my Camaro in size 18x9.

Thanks for your help.

 

The correct method for measuring backspace is covered in one of the posts in the "FAQ" stickied at the top of the Wheels and Tires topic listing. Offset is mathematically related to backspace, so if you know one of them and the overall width of the whee, that's all you need. You also need to tell them its a 5x4.75" bolt pattern.

Its easiest to measure the backspace. If you can tell us the backspace, and the overall width of the wheel, measured from the outside edges of the flanges that hold the tire beads on the rim, we can calculate the offset for you.