and commercialized the radial tire. The first Michelin X radial tire for cars was developed in 1946 by Michelin researcher Marius Mignol. There is no evidence that the former accountant turned researcher Mignol had knowledge of Hamilton or Savage's earlier work when he began his experiments in 1941.

Michelin owned the leading automaker Citroën, so it was quickly able to introduce its new design, including on the new 1948 Citroën 2CV model. In 1952, Michelin