'Wheels' in the Bible

The Lord was with the men of Judah. They conquered the hill country, but they could not conquer the people living in the coastal plain, because they had chariots with iron-rimmed wheels.

The Israelites cried out for help to the Lord, because Sisera had nine hundred chariots with iron-rimmed wheels, and he cruelly oppressed the Israelites for twenty years.

he ordered all his chariotry -- nine hundred chariots with iron-rimmed wheels -- and all the troops he had with him to go from Harosheth-Haggoyim to the River Kishon.

The mother of Sisera looked out at a window, and cried through the lattice, Why is his chariot so long in coming? why tarry the wheels of his chariots?