There were four wheels under the panels, and the axles of the wheels were attached to the stand; each wheel was a cubit and a half in diameter.

1 Kings 7:31
The opening to each stand inside the crown at the top was one cubit deep, with a round opening like the design of a pedestal, a cubit and a half wide. And around its opening were engravings, but the panels of the stands were square, not round.

1 Kings 7:33
The wheels were made like chariot wheels; their axles, rims, spokes, and hubs were all of cast metal.

And under the borders were four wheels; and the axletrees of the wheels were joined to the base: and the height of a wheel was a cubit and half a cubit.