BBS CH CH012 inspired decorative wheel — STEP and STL

Reference CH012: 18 x 8.5 inch nominal bead-seat size, 5 x 112 mm PCD, ET35 mm. Modeled bore 60 mm; see bore evidence limitations below. ## Architecture and files Two primary parts: integral rim/center wheel and separate blank cap. `wheel` omits the cap; `complete` contains two shells. No perimeter hardware. Includes 3 STEP and 3 STL files: `wheel`, `cap`, `complete`. Six actual exported-STL previews: front, rear, side, isometric, cap-removed rear and radial section. No source photos or diagnos…

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