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.

Offset & backspacing

Convert Tacoma wheel offset and backspacing.

Enter wheel width with an offset or backspacing to convert between them and see how far the tire moves in or out.

In short

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.

Wheel spec

Convert between offset and backspacing.

Wheel width (in)

Convert

Offset (mm)

Compare to stock offset (mm)

5.93 in backspacing

A +30 mm offset on a 8.5 in wide wheel.

Offset: +30 mm
Backspacing: 5.93 in
Poke vs stock: 0.0 mm
Track-width change: 0.0 mm

A lower or negative offset pokes the tire outward and widens track; a higher offset pulls it inboard toward the upper control arm. Positive poke means the wheel sits farther out than stock.

Tacoma factory offsets

Approximate OE wheel offsets by generation and trim.

Generation	Trim	Wheel	Offset
3rd gen	SR / SR5	16x7	+25 mm
3rd gen	TRD Off-Road	16x7	+13 to +25 mm
3rd gen	TRD Sport / Limited	17-18x7.5	+30 mm
3rd gen	TRD Pro	16x7.5	+10 to +13 mm
4th gen	SR / SR5 / TRD Off-Road	17-18x7.5	+55 to +60 mm
4th gen	TRD Pro / Trailhunter	18x8.5	+20 to +25 mm

What it does

How this tool helps.

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.

Convert Tacoma wheel offset and backspacing.

How this tool helps.

Offset and backspacing

Poke and tuck

Tacoma factory offsets

Related tools

Wheel Offset and Backspacing Calculator FAQ.