BagCheck compares the three exterior measurements in the best physical orientation. It does not invent a missing axis label or assume that unknown protrusions are included.
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Evidence
Exact selected SKU R4027; official snapshot sources/c0ed1115a64b502d.json, SHA256 f580a5911d9a639f76bdd83aa3507016de78b073bf7e487c2774bb5dff27fdf0. Model label distinguishes capacity/material/mounting, not colour. Published dimensions are not a measured packed/compressed maximum or a guarantee that hardware is included. Roll/fold closure and attached hardware must fit when packed. No compression allowance inferred. Manufacturer load rating is not empty weight or an airline allowance.