i worked at a esso station after i got out of nam and we sold these tires, some where around 1972. they were promoted by the company to be the new all season tread that you could run winter and summer. back then everybody changed tires every spring and fall. kinda cut into our profits for about 2 years that they were on the market, but didnt have the winter traction that you need up here in maine so they stopped making them because no one bought a second set.........rants from a old man........