CALCULATOR · FREE免费 · Free
Wheel Offset Calculator
Enter wheel width and offset to estimate backspacing and front spacing, then judge suspension and fender clearance.
--Backspacing · in
--Front spacing · in
Estimates only; verify on site before ordering or building.
Example
| Item | Value | Unit |
|---|---|---|
| Wheel width | 8 | in |
| Offset | 35 | mm |
| Backspacing | 5.38 | in |
| Front spacing | 2.62 | in |
Where people go wrong
- Treating offset and backspacing as the same thing; they use different units and reference points.
- Entering wheel width in millimeters while the formula expects inches.
- Checking wheel numbers but not brake caliper and suspension clearance.
FAQ
What is wheel offset?
The distance from the mounting face to the wheel centerline in millimeters; positive offset means the mounting face sits outboard.
Can I change offset freely?
Not by much; it changes steering feel, bearing load and fender clearance.