Backspace for wheels on 1973 Buick Riviera

Discussion in 'A boatload of fun' started by mmws6, Mar 24, 2019.

  1. mmws6

    mmws6 Member

    I was just curious what others on here running 20 or 22 inch wheels have done to make them fit their Riviera boat tails. I am curious about the backspace also on the wheel.
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    There are no back space requirement differences between a 15" wheel and larger wheels. Wheel width will affect the back space requirement though. Look at the Rallye wheel chart,

    The big car wheels for 71-85 (5 X 5) were 6" wide with a back space of 3 7/8". If you want to keep the tire centered in the wheel well, then for each 1" you widen the wheel, you add 1/2" of back spacing. So for a 7" wide wheel, you want 4 3/8". For an 8" wide wheel, 4 7/8". You can also measure the back spacing on your current wheels and go from there.

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