Michelin, 40 years in MotoGP

Michelin made its Grand Prix debut back in the early seventies. The
rounded profile of the PZ tyre - a road tyre offering a contact patch
larger than its competitors - gave an immediate advantage to its
riders, who were able to enjoy higher grip levels.
In 1975 Michelin introduced the first slick tyres, a major breakthrough
for motorcycle racing.

Barry Sheene - "At the beginning we didn't realize that the slick
tyres were such a revolution because we didn't know how to make the
most of them," explained the late Barry Sheene a couple of years ago,
before his death in 2003. "I remember that I thought: 'Wouldn't
they be better with nice grooves?'

The eighties were also a decade of an important innovation. Michelin
introduced the new radial tyre, which gave a whole new dimension to the
handling of the 500cc bikes and became the new standard for road-tyre
ranges. Spencer was the first rider to win a race with the Michelin
radial tyre, in 1984. Since then, this type of tyre has dominated the
category.
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Squirming slidey hoops of shit. What bunch of idiots would apply a car
tyre to motorcycle racing? but the French.