Offset calculator for cars
Compare stock and aftermarket wheels to estimate outer poke, inner clearance, wheel width change, and track width change before you buy wheels for your car.
This calculator compares wheel dimensions only. It does not confirm vehicle compatibility, tire clearance, brake clearance, or rubbing risk. For a vehicle-specific recommendation, use Fitment.
Wheel Offset Calculator
Outer poke
+23 mm
Positive means the new wheel sits farther toward the fender.
Inner clearance
-3 mm
Negative means the new wheel is closer to suspension.
Width change
+25 mm
Total wheel width difference converted from inches to mm.
Track change
+45 mm
Estimated per-axle track width change from both sides.
Positive offset means the mounting face is closer to the outside face of the wheel, which usually pulls the wheel inward. Lower positive offset, zero offset, or negative offset moves the wheel outward and usually creates more poke.
Outer poke is how much farther the new wheel sits toward the fender compared with the current wheel. More poke can look more flush, but too much can rub the fender or quarter panel.
Inner clearance is the space between the wheel and suspension or chassis. A wider wheel or higher offset can reduce inner clearance even if the outside position looks conservative.
After the offset calculator gives you a starting point, use vehicle-specific fitment data to check real-world constraints for your platform.
Browse fitment guides ->Wheel offset FAQ
Wheel offset is the distance in millimeters between the wheel mounting face and the wheel centerline. Higher positive offset pulls the wheel inward, while lower offset pushes it outward.
Enter your current wheel width and offset, then enter the new wheel width and offset. The calculator estimates how much farther the new wheel sits toward the fender and how much inner clearance changes.
Usually, yes. A lower offset pushes the wheel outward, but width matters too. A wider wheel with the same offset can also add poke and reduce inner clearance.
Tire size does not change wheel offset, but it can change real-world clearance. Wider or taller tires can rub even when the wheel offset math looks reasonable.
Need vehicle-specific numbers?