Snow tire spikes

A snow tire spike which comprises:

• a single, integral spike body made of a ceramic material, said spike body having a first end, defined by a first radially outer annular surface, for anchoring said spike in a tire, and a second end, defined by a second radially outer annular surface, for contacting the ground when said spike is in use in the tire, said first end having a diameter larger than, but smaller than 1.5 times, the diameter of said second end, said first and second radially outer annular surfaces being joined by a third radially outer annular surface to form a continuous smooth surface at least from said second end to said first surface;
• and
• a flange made of a plastic material coated directly on at least said first surface of said spike body, on the entirety of said first surface.