Japanese tyre and rubber manufacturer Yokohama is planning to invest into and even buy Prometeon, the new name for the former Pirelli commercial and industrial tyre manufacturing operation, according to a range of sources. Tyres & Accessories first heard this news in July and then the Italian financial press subsequently suggested that Prometeon’s shareholders were considering restructuring Prometeon’s ownership. Yokohama is understood to be leading the suitors. The official Yokohama/Prometeon investment announcement is expected during the course of the next week or so.