Measure a comparable baseline reference
The optional gaps refer to the baseline nominal tire envelope: one inboard gap, one outboard gap and one radial gap. The candidate estimate subtracts the corresponding nominal intrusion, protrusion or radius increase. Blank values remain unknown instead of becoming an invented zero-clearance measurement.
The baseline and candidate must be compared at the same reference position for this arithmetic to be meaningful. A static gap recorded at one steering or suspension position cannot represent every movement the vehicle may experience. The tool does not simulate those movements or the detailed shape of an obstruction.
Interpret nonpositive and positive results carefully
A nonpositive result means the simplified candidate envelope reaches or crosses the supplied static reference. That is a clear reason to review the inputs and actual geometry. A positive result merely means this particular subtraction remained positive. It does not establish a margin that is suitable in motion.
Nominal tire width can differ from measured section width on a specific rim, and the sidewall is not a perfect rectangle. The drawing intentionally shows simple rectangles and circles so its assumptions are visible. It does not imply a reconstructed tire carcass, tread shape or wheel profile.
Keep an editable copy alongside the report
The project JSON preserves both specifications, speed input, unit and optional measurements. The calculation JSON retains detailed values, while CSV is a compact ledger. PDF and SVG communicate the geometric changes visually. None of the formats requires an account or a server-side upload.
After changing candidate offset or spacer in the interactive result, prepare fresh files. Swapping the setups clears the measured gaps because those values belonged to the previous baseline. Save the new project explicitly; the tool does not maintain a hidden browser-storage backup or a vehicle-fitment history.