bias ply tire memories.
An annoying story from the old days. NAS Miramar in the early 70's had 3 gates, and I mostly used either the main gate out onto highway 15, or the west or "back" gate out onto Miramar road. At the time and for some time after I'd bought the car it had G60X15 tires, and I was either waiting for a tire guy to get 2 more or something going on. ANYway I borrowed 2 mounted G or F 70x14 for the rear for a few days
So I'm going out the back gate. And there's a short little Marine who'd talked to me in the auto hobby shop, and he stops me, and he's giving me ****. Funny, but yet. "I bet you can't" all that stuff. This was still the 440-6 in the car headers, cam. Anyway I moved it up in RPM, just bumped it up got into the clutch and firewalled the throttle, and soon found out "we" needed 2nd gear. Those little bitty f70 poly tires made the thickest, blackest, shiniest tracks I've ever seen. Two sets of long wavy tracks.
This marine is back out there a few days later and he stops me again. "DAMN what is IN that thing? Some officer came up behind and demanded I tell him "who was that?" I told him "Hell I don't have any idea I couldn't see anything for the tire smoke!!"
Bear in mind that traffic violations on a Navy base were no joke. And getting the use of your car kicked off Miramar would have been a lot more than a PITA. It would have been a gigantic inconvenience!!1