Wheel Offset Visualizer
Illustrate wheel position changes from offset and width in a scaled cross-section. See inner edge, outer edge and centerline movement.
Illustrate wheel position changes.
Wheel Offset Visualizer: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Wheel Offset Visualizer Works?
The Wheel Offset Visualizer works by drawing a scaled cross-section of the old and new wheels against the hub mounting face and marking the inner edge, outer edge and centerline of each. The tool uses 4 steps.
Enter the old wheel
Type the current wheel's width and offset, such as 8.0 in at ET35.
Enter the new wheel
Type the proposed wheel's width and offset, such as 9.0 in at ET45.
Draw the sections
The visualizer draws both wheels from the shared hub face, with backspacing toward the suspension and frontspacing toward the fender.
Label the movement
The visualizer labels 22.7 mm inner movement, 2.7 mm outer movement and 10 mm inward centerline movement.
Wheel Offset Visualizer Formula
The Wheel Offset Visualizer places each wheel edge from the hub face with BS = (W + 1) × 12.7 + ET and FS = (W + 1) × 12.7 − ET.
x_in = −BSx_out = +FSx_c = −ETΔx = x_new − x_old- x
- Position from the hub face (mm), negative = toward suspension
- BS, FS
- Backspacing and frontspacing (mm)
- ET
- Offset (mm)
Worked example
Moving from 8.0 in ET+18 to 10.0 in ET−25 shows the inner edge moving 17.6 mm outward, away from the suspension and the outer edge moving +68.4 mm (2.69 in) outward. The centerline moves 43 mm outward.
Wheel Offset Visualizer Conversion Table
The Wheel Offset Visualizer conversion table lists the 3 movements the drawing shows for 5 wheel changes.
| Wheel change | Inner edge (+ = inward) | Outer edge (+ = outward) | Centerline (+ = outward) |
|---|---|---|---|
| 7.5" ET+45 → 8.5" ET+35 | +2.7 mm | +22.7 mm | +10 mm |
| 8.0" ET+35 → 9.0" ET+45 | +22.7 mm | +2.7 mm | -10 mm |
| 8.0" ET+18 → 9.0" ET+0 | -5.3 mm | +30.7 mm | +18 mm |
| 8.0" ET+18 → 10.0" ET-25 | -17.6 mm | +68.4 mm | +43 mm |
| 8.5" ET+40 → 8.5" ET+25 | -15.0 mm | +15.0 mm | +15 mm |
What is Wheel Offset Visualizer?
A Wheel Offset Visualizer is a tool that draws a wheel's position relative to the hub so offset and width changes show as movement. Offset numbers are abstract. A cross-section shows which way the wheel moves and by how much.
The drawing separates 3 movements: the inner edge, the outer edge and the centerline. Width changes move the edges apart. Offset changes move all 3 together.
The visualizer uses the industry rule of nominal width plus 1 in for the flange-to-flange width.
What are the uses of Wheel Offset Visualizer?
There are 4 main uses of the Wheel Offset Visualizer, including fitment explanation and stance planning.
Fitment explanation
Show a customer why a wheel rubs the strut.
Stance planning
Preview poke and tuck before buying.
Spacer previews
Add a spacer and see the new position.
Training
Teach offset, backspacing and frontspacing in one picture.
Related Wheel Geometry & Fitment Tools
View All 134 Subtools →Calculate wheel mounting offset.
Compare old and new offsets.
Calculate backspacing using specified wheel dimensions.
Convert mounting measurements.
Calculate outward wheel projection.
Account for spacer thickness.