80-85% tread life on all 4 tires
If this helps, I have three (3) Dunlop SP SportMaxx GT 255/3519R tires with 50% treadlife. I got a flat tire and ended up replacing all four tires.
If you don't want all three tires, you can buy them individually for $75 each.
Maybe someone wants to buy 2 of ours and 2 of mine.
I'm located in NY