Wheel Backspacing Calculator

Enter wheel width plus offset or backspacing to calculate the other measurement.

Mode

Published wheel width (in)

Offset (mm)

—Backspacing

—Offset

—Approx. overall width

—Frontspacing

—Backspacing estimate assumes overall rim width is approximately 1 inch wider than the published bead-seat width. Measure the actual wheel when precision matters.

How to use this Wheel Backspacing Calculator

Convert between wheel offset and approximate wheel backspacing. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.