Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello I will help,
Backspacing is how far the rim is moved from the center of the tire on the rim. YOu can have negative or positive backspacing to move the tire in or out in relation to the hub of the wheel.
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That will tell you what was stock and if you still need to get something different from that let me know