Free Wheel Offset Calculator Online
Determine inner clearance and outer wheel position changes when upgrading custom car wheel widths and offsets.
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Upgrading Rim Widths and Offsets
Calculate wheel stance and clearance modifications. Check suspension clearances before purchasing custom rims.
Frequently Asked Questions (FAQ)
What is wheel offset?
Wheel offset is the distance from the wheel's mounting hub center-line to the actual physical center-line of the wheel, measured in millimeters (mm).
What is positive vs negative offset?
Positive offset means the hub mounting surface is closer to the street side, pushing the wheel inward. Negative offset pushes the wheel outward, creating a wider stance.
What is inner clearance?
Inner clearance is the space between the inside edge of the wheel and the suspension components (strut, control arms). A loss of clearance may cause rubbing.
What is wheel backspacing?
Backspacing is the distance from the mounting hub to the back edge of the wheel, which determines inner clearance.
Is my fitment data saved?
No. FastCalc.tools is 100% server-less and operates entirely client-side.