What is this old wheel brick? What is this old wheel brick? Wheels are also available in about the half size. They have metal axles.
There are some variants registered on bricklink, but judging by the name and the presence of the brick in the middle, I guess the closest is:
Wheel with 12 Studs and Axle Cam with Light Gray Tire Smooth - Large (715a / 36)

The small version you mention is probably:
Wheel with 4 Studs and Axle Cam with Light Gray Tire Smooth - Small (7039b / 132-old)