My blue and white Tricycle... it's the one I rode the most. But you mentioned 'pedal cars' and I remembered.. I had one of those as well, before the Tricycle.
The pedal car was difficult because we didn't have paved driveways, all dirt. The pedal car had narrow tires which made pedaling difficult. The Tricycle has much wider tires and were much easier to use. I believe, (almost sure), both had solid rubber tires.... with the number of goat heads in our yard inflated tires would have been very short-lived. - JamesJM