The IS wears its hardware on the outside. Every design sets a concave face inside a wide, stepped barrel, with a ring of exposed rivets at the join — multi-piece construction treated as decoration rather than hidden behind a cover. That framework holds whatever the face: clean five-spokes, paired twin-spokes, dense lattices and the odd turbine all sit on the same riveted barrel. The dish is pronounced across the range, filling the arch without leaning on offset alone. It's the look of a wheel that earned its keep on track before it found the street.