Wheel width and wheel back spacing is very important for proper wheel fitment.

Use this chart to determine wheel offset using back spacing measurement

  1. Step 1 - Measure wheel width
  2. Step 2 - Determine the back space measurement by laying a straight edge across the bead seat of the inside edge of the rim, and measuring from the hub flange to the straight edge.
  3. Step 3 - Using the chart below, find where the row for the wheel width intersects with the column for the back spacing measurement. This is the wheel offset.
  4. * Please note, for Optimum tire fitment with our leveling kits, we recommend a +12 wheel offset for custom wheels.
Wheel Offset

Back Spacing in inches

3.25 3.5 3.75 4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.75 7 7.25 7.5 7.75 8
6 12 19 25 32 38 44 51 57 63 69 76
5.5 0 6 12 19 25 32 38 44 51 57 63 69 76
6 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
6.5 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
7 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
7.5 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
8 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
8.5 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
9 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69 76
9.5 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63 69
10 -57 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57 63
10.5 -63 -57 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51 57
11 -69 -63 -57 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44 51
11.5 -75 -69 -63 -57 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38 44
12 -81 -75 -69 -63 -57 -51 -44 -38 -32 -25 -19 -12 -6 0 6 12 19 25 32 38

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