This was my grandfather & the neighborhood boys on a downhill racer they built from parts they collected. Late 1920s my Grandfather is in the drivers seat.
This one looks like cowboy bad guy actor Robert Wilke (not to be confused with the car owner of the same name) posing in the Schmidt Special. And the tread pattern looks like what was used in 1960. If that is the year then Bob Veith drove this car to 8th place.
This is what happened when boredom overcame a guy with a torch and an arc welder in small town, USA in the old days. My dad’s uncle turned a Lloyd Alexander and a pile of J.C. Whitney accessories into this.
Who is Denise Diplock? It's a long story use the HAMB search feature,there are numerous post related to her.