Effective offset
A spacer reduces offset by its thickness; see the resulting effective offset instantly.
Wheel spacers
Enter your wheel offset and a spacer thickness to see the effective offset, added poke, and track-width change.
What it does
A spacer reduces offset by its thickness; see the resulting effective offset instantly.
Each corner moves out by the spacer thickness, adding twice that to axle track width.
Hub-centric bores, the 1.25 inch daily max, and why 3rd and 4th gen spacers do not swap.
A 1 inch spacer is about 25.4 mm, so it reduces effective offset by roughly 25 mm and pushes each wheel out about 1 inch.
Hub-centric spacers up to about 1.25 inch are widely considered safe for daily use and stress the wheel bearing no more than an equally aggressive low-offset wheel. Larger sizes are better handled with correct-offset wheels.
No. 3rd gen and earlier use a 106.1 mm hub with M12x1.5 studs, while the 4th gen uses a 95.1 mm hub with M14x1.5 studs, so the spacers are not interchangeable.