Wheel Offset Calculator — Compare Wheel Fitment for Your Vehicle

Wheel Offset Calculator

Calculate wheel offset, compare fitment between different wheels, and determine optimal wheel specifications for your vehicle.

Step 1: Current Wheel Specifications

Understanding Wheel Offset

Wheel offset is the distance between the wheel’s mounting surface and its centerline. Positive offset means the mounting surface is toward the outer side, negative offset toward the inner side.

Step 2: New Wheel Specifications

Offset Calculation

The offset difference affects how far the wheel sits in or out of the wheel well. Proper offset ensures proper fitment and prevents rubbing against suspension or body components.

Wheel Fitment Analysis Results

Summary
Wheel Comparison
Visualization

Wheel Position Change

+10mm
Wheel sits 10mm further out
Inner Clearance Change
-5mm
Outer Position Change
+15mm
Overall Diameter Change
+1 inch
Fitment Rating
Good

Wheel Specification Comparison

Wheel Type Width (in) Diameter (in) Offset (mm) Position Change Fitment

Wheel Fitment Visualization

Wheel Offset Calculation Formula

Position Change = (New Width × 25.4 ÷ 2) – (Old Width × 25.4 ÷ 2) + (Old Offset – New Offset)

The wheel position change is calculated by comparing the centerlines of old and new wheels, then adjusting for offset difference. All measurements are converted to millimeters for consistency.

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