Wheel Offset Calculator
Compare a current wheel and a new wheel by width and ET to see exactly how inner clearance, poke and track width will change.
Current wheel
New wheel
Inner change
+2.7 mm
Less inner clearance
Outer change (poke)
+22.7 mm
Pokes outward
Track width change
+45.4 mm
Total across axle
ET delta
-10 mm
Warnings
- Wheel pokes outward — check fender clearance and local fender-cover laws.
Side-profile view
Both wheels shown from above the axle. The vertical dashed line is the wheel centerline. The orange marker is the hub mounting face.
How offset works
Positive ET: mounting face is outboard of the wheel centerline. The wheel tucks under the fender — common on FWD and modern cars.
Lower or negative ET: mounting face moves inboard, pushing the wheel and tire outward. Track width grows and the stance becomes more aggressive, but inner geometry is unchanged on a same-width wheel.
Wider wheel, same ET: extra width is split equally inward and outward. You gain poke and lose inner clearance — which is why aggressive widths usually need an ET increase to avoid rubbing the strut.