What is wheel offset (ET)?

Wheel offset (ET, from German 'Einpresstiefe') is the distance in millimeters between the wheel's mounting face and its centerline. Positive ET pushes the wheel inward (tucked), negative ET pushes it outward (poke). Most stock cars run +30 to +45mm ET.

What does 'poke' mean in wheel fitment?

Poke means the outer face of the wheel and tire extends beyond the fender lip. It's measured in millimeters. Too much poke risks catching the fender lip or failing inspection; the safe threshold varies by car and jurisdiction.

What does 'tuck' mean in wheel fitment?

Tuck means the wheel and tire sit inside the fender, hidden from the side. Tuck is safe from road debris and legality issues but reduces the aggressive stance look. Inner clearance is the critical measurement for tuck fitment.

How does negative camber affect wheel fitment?

Negative camber tilts the top of the wheel inward, moving the contact patch and lower wheel edge outward. This effectively increases poke at the bottom of the wheel. Fitment Stance's camber slider simulates this effect in real time so you can see the impact before purchasing wheels.

What is the difference between wheel width and diameter?

Wheel diameter is the size measured across the wheel face (e.g. 17", 18", 19"). Wheel width is the internal measurement from bead seat to bead seat (e.g. 8J, 9.5J). Width directly affects how far the tire sits in or out of the fender, and wider wheels typically require lower (more negative) offset to avoid rubbing.

Fitment Stance - Wheel Offset Calculator

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