Vehicles & Transport calculator
What Wheel Offset Do I Need?
Use existing wheel width, existing offset, new wheel width to find wheel offset clearance change.
Enter your measurements
What Wheel Offset Do I Need uses existing wheel width, existing offset, new wheel width and the other configured measurements to return wheel offset clearance change with a formula written specifically for this tool.
- Existing wheel width — Required
- Existing offset — Required
- New wheel width — Required
- New offset — Required
- Available inner clearance — Required
- Available outer clearance — Required
Wheel offset clearance change
Enter the measurements above to calculate wheel offset clearance change.
How the calculation works
V9 calculation: innerMove=(newWheelWidth-oldWheelWidth)/2+(newOffset-oldOffset); outerMove=(newWheelWidth-oldWheelWidth)/2-(newOffset-oldOffset); innerPass=innerMove≤innerClearanceAvailable; outerPass=outerMove≤outerClearanceAvailable; overallPass=innerPass AND outerPass. The result is reported as wheel offset clearance change.
Worked example
Example: Existing wheel width = 60 cm; Existing offset = 50 cm; New wheel width = 60 cm; New offset = 50 cm; Available inner clearance = 5 cm; Available outer clearance = 5 cm. Result: Fits; Outer Pass = Pass; Inner Pass = Pass; Outer Move = 0.
Before you decide
Enter the dimensions that will exist in real use, not an approximate catalogue category. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what wheel offset do i need, the limiting result on this page is wheel offset clearance change.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Wheel Offset calculator tell me?
It returns wheel offset clearance change from the measurements entered on this page. The calculation is specific to wheel offset, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for wheel offset?
Measure existing wheel width, existing offset, new wheel width, new offset, available inner clearance, available outer clearance. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the wheel offset clearance change?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned wheel offset clearance change while allowing for the clearances, tolerances or ratings shown by its manufacturer.