Compare two wheels (width + offset) to see poke, tuck and inner clearance change.
Width in inches and offset (ET) in mm for your current and new wheels.
We convert width to mm and work out the front (outer) and back (inner) face positions.
Positive poke means the wheel sits further out; reduced inner clearance can foul suspension or brakes.
Offset is the distance in mm between the wheel mounting face and its centreline. A higher ET tucks the wheel inward; a lower ET pushes it outward (more poke).
The outer lip moves out by (half the extra width) plus the drop in offset. The calculator gives the exact mm change at the outer and inner edge so you can check for fender or suspension clearance.
A small change is usually fine, but too much poke stresses bearings and may rub the arch; too little inner clearance fouls struts or brakes. Check both numbers before buying.
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