I would suspect that they would want to make a run of some popular size rear tires ie: F-60, G-60, L-60. I don't know, but their green light towards the run would hinge on at least a 100 orders to make it viable. I myself would spring for 8 tires, two of which would be front runner types 6.40 X 15 for the black car and the rest for the daily driver.

I'm just reaching out to a possible market out there that doesn't necessarily care too much for traction and or comfort. I remember being laughed at way back when I ran McCreary's out back until they starting getting their @$$ cooked.
I myself know that when I turn the key in any of my old jalopies, the rattle shake and roll is part of the fun.