First, you can observe the logo on the side of the tire. Usually the side of new tires will have the tire's trademark and related parameters, while most of the retreaded tires are fake and affixed. Try to pick it out. If it is a retreaded tire, you can pick out these marks. Especially the production date. Changing the production date is a common operation for retreading tires.

Observe lanugo hair. New tires have lanugo hair, but retreaded tires cannot fake lanugo hair. (The identification diagram of retreaded tires and new tires is shown below)

Observe the pattern gloss of the tires. The pattern of new tires has a soft luster, while retreaded tires will be over-waxed due to the gloss, making them look unusually bright and have shallow patterns.

Observe the tire elasticity. New tires have better elasticity than retreaded tires. Use a key to lightly scratch the tire. If it is a new tire, the scratches will disappear quickly, but a retreaded tire will not recover for a long time, leaving scratches.