3/32x790 Piranha. "Soft, Natural, Aromatic Rubber." Alpha's Piranha tires really bite the track, especially when very clean and/or slippery. And they feature high quality, lightweight magnesium rims. These rims give the Piranha tires a big advantage over the other brands using aluminum hubs. The original Piranhas have won thousands of races! Features a cup point set screw. Color: Black only.