Tread Test

Vrrr... click. My axles shuddered. A rumble surged straight down to my wide tires. I gripped the thick fabric fibers below. Traction confirmed. Right in front of me sat a low red toy car with a white hood. Obstacle detected. I surged forward, pushing my front bumper right against its side. Solid resistance. Clack! Suspension took the impact perfectly. I am mobile, and nothing stands in my way.