On Sunday, May 10, 2015 at 1:45:44 AM UTC-4, micky wrote:
OT I ended up with a pair of tires that only go in one direction. I
want to learn about these things but I don't know what they are called.
What are they called.

My '86 Thunderbird Turbo Coupe came with unidirectional tires. I never understood what that was all about but when I rotated the tires, I made sure that the directional arrows on the sidewalls went the right way, figuring that it couldn't hurt and might help.