# Wheel Offset and Backspacing Calculator

Convert wheel offset to backspacing and back, and see how an offset change moves a Tacoma tire in or out. Includes factory offsets by generation and trim.

## Canonical URL
https://tacotires.com/wheel-offset-calculator

## What It Does
- Offset and backspacing: Convert either way for any wheel width, including the half-inch rim-flange allowance real wheels have.
- Poke and tuck: See how many millimeters a lower or negative offset moves the tire outward versus stock.
- Tacoma factory offsets: Stock offsets by generation and trim so you can compare an aftermarket wheel to what is on the truck.

## Summary
- Converts between wheel offset in millimeters and backspacing in inches for a given wheel width.
- Uses backspacing equals width over two plus 0.5 inch flange allowance plus offset over 25.4.
- Shows how much a lower or negative offset pokes the tire outward, with Tacoma factory offsets by generation.

## FAQ
### How do I convert offset to backspacing?
Backspacing equals half the wheel width plus a 0.5 inch rim-flange allowance plus the offset divided by 25.4. Enter your width and offset above to do it automatically.

### What offset does a Tacoma come with?
3rd gen wheels are roughly +25 to +30 mm, with the TRD Pro lower near +10 to +13 mm. 4th gen base wheels are unusually high at about +55 to +60 mm, while TRD Pro and Trailhunter run about +20 to +25 mm.

### Does a lower offset cause rubbing?
A lower or negative offset pushes the tire outward, which increases rubbing at the fender, liner, and front bumper, especially at full lock. Higher offset pulls the tire inboard toward the upper control arm.

## Related Tools
- [Wheel spacer calculator](https://tacotires.com/wheel-spacer-calculator)
- [Bolt pattern calculator](https://tacotires.com/bolt-pattern-calculator)

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