I Had the Motors but No Wheels, So I Cast My Own Silicone Tires

Four N20 gear motors with encoders and not a single wheel, so I cast my own. One mold printed on a Creality Ender-3 V3 KE: four cavities, four cores, nine M4 bolts, eight funnels and 24 vents of Ø2 mm so the air can get out. The rubber is DEVE DVSIL-P25 platinum silicone mixed 1:1, 20 g + 20 g with a few drops of pigment. Four hours later the red tires came out with a sharp herringbone tread; the black ones overnight. Nine wheels, eight colour combos: which one goes on the robot?