Wheel fit issue question

Datsrboi

Loud pipes Save Lives
Jul 31, 2007
797
0
0
Haltom Texas
www.cardomain.com
16x8" 5x4.5 bolt pattern and a 4.5" backspacing

What does this mean with the backspacing thing? Trying to see if they will fit the supra correctly but see nothing about offset so confused.

Yes I do not see anything in the search about explaining the backspacing fitment. Only offset.