Yes they wear, yes you can own them, very expensive, and they may be more resistant to spikes than normal tires they are not immune to being punctured.
No they do not. Every part of a SWAT truck is bulletproof besides the tires. There really isn't much explanation for that fact, but it's true.
Bulletproof windows and tires that cannot be punctured
The legal limit is 1.6 mm
1. Prohibited May 1st to October 1st. Except as provided in subsections 2 and 3, from the first day of May to the first day of October, a person may not operate a vehicle with tires having metal studs, wires, spikes or other metal protruding from the tire tread.
are studded snow tires legal in Illinois for postal trucks?
Not on a public street or road.
No, studded tires are not legal in Illinois.
Wider tires are better for high speed bends and turns.
Bald tires can effect anything concerning braking. You will not stop as quickly with bald tires as with tires with tread period. No matter if you have ABS or not.
yes
They are completely unrestricted in kentucky.
yes