3030 Autosport Wheel Offset Calculator

Wheel Offset & Backspace Converter

Enter wheel width and either backspace or offset to convert. Frontspacing is calculated automatically.

Wheel Width (inches): Backspace (inches): Offset (mm):

Quick Notes:

Offset: Distance from wheel centerline to hub mounting surface (mm). Positive: mounting toward front; Negative: toward back; Zero: at center.
Backspace: Distance from hub mounting to inner wheel edge (inches).
Frontspace: Distance from hub mounting to outer wheel edge (inches).
Calculations account for typical ~1" wheel lip (outer-to-outer wider than specified width).