Patent No. EP3921183 (titled "Wheel Rim Structure For Motor-Vehicles") was filed by Trelleborg Wheel Systems Italia on Jan 16, 2020. The application was issued on Oct 22, 2025.
A wheel rim structure for motor vehicles that minimizes structural stresses in the circumferential profile area where the lateral parts join the central region. The structure features a curved surface with a first radius of curvature (R1) of 10-20 mm and a second curved surface with a radius of curvature (R2) of 40-80 mm, preferably 50-70 mm, which provides improved structural integrity and reduced tire inflation time.

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