7-8/32 Tire Tread?

Question

I have a guy thats wanting to give me a great deal on two tires. The person that im talking to sells used tires that are in great condition. He says that there are 7-8/32 tread left and Im not sure if thats good or bad. Can someone tell me where those stands. Also, How long would those tires last at the tread level.

Answer 1

A tire that starts with 10/32" of original tread depth has 12.5% wear for every 1/32" that is worn away, and a tire that starts with 12/32" " of original tread depth, has 10% wear for every 1/32" that is worn away, etc.

Answer 2

Good tires are removed from vehicles all the time. Dealerships remove good used tires in order to put cheap crappy new tires on to give you feeling of a better car.  I rarely buy new tires except for my wife's car and I have found that used tire dealers or Craiglister's are often better than the new tire dealers with all the charges.