Denny, 7.00x15 and 7.50 were 6 and 8 ply light truck tires in those days. 6.70x15, 7.10x15 and 7.60x15 were 4 ply passenger tires. A 1954 Chev would have come with 6.70x15 a Pontiac with 7.10x15 and an Olds and Buick with 7.60x15. A Caddy would have had 8.20x15. We sold BF Goodrich in those days and I changed a jillion of them on an old Henderson manual tire changer.
Life was simple on those days and people just couldn't believe that we often had over 100 tires in stock.
