Hello, Cool photo capture of an early go kart with gravity for speed… or a brother pushing on your back all the way to the school yard for some bicycle pulling a long rope adventures. Once the back pushing started, the Schwinn rode with a rope pulling the rolling cart and a young adventurer hanging on for dear life. The crude 2x4 or less size wooden frame was “nothing to write home about.” Borrowed wheels from a trash cart or a wagon made it roll. Some rope for steering a wide bar of lumber attached to the center frame with a single bolt and nut found in a garage drawer made the custom steering possible. Go power was the slopes of the sidewalks and short hill grades on any road or for us, a nearby school yard. Jnaki My brother added a loop with a bent nail to attach the rope, when he had to pull me behind his bicycle, on our way to the school yard with tons of places to drive and coast. As fast as he could pedal, that was as fast as I could go with the wobbly construction frame and tires. The steering was not as accurate as it could have been. But at least, we got pulled fast on the smooth baseball blacktop school yard fields. Stopping was dragging a wooden stick on the ground that was attached to the frame with a through bolt. The smooth drainage ditch became our fancy dip and highlight lift, if we got pulled really fast. Solid tires and suspension of solid wood made for some hard knocks in our young lives… When it was my turn on the bicycle, I pedaled as fast as I could, all over the school yard, through covered outdoor hallways, on different blacktop surfaces and around backstops for some fast challenges. My brother had a smile on his face, the faster I pedaled… YRMV Literally, we lived “hard knock lives…Ha!