Why does the throne in Daniel 7:9 have wheels and are they literally wheels? Daniel 7:9 


  He sat on a fiery throne with wheels of blazing fire.  


There are also references to wheels in Ezekiel Chapter 10 (which may or may not be related).

Is there a significance to the throne having wheels?

Are they actually wheels?  Why are they on fire?

I read the Wikipedia article on Ophanim  and it almost led be to believe that these "wheels" were actually beings that enabled the thrones to move.
David Pawson has an interesting answer, referring to a similar vision in Ezekiel 1. First, bear in mind that the Israelites were at that time in captivity in Babylon. Then:

Clearly, the throne can travel in any direction. This symbolizes the omnipresence of God, who is able to be anywhere and everywhere. He is a mobile God. This is significant because, until this point, every vision of God’s throne in the Bible had portrayed it as static, fixed in Jerusalem. So it was a comfort for Ezekiel to learn that God’s throne was mobile, for it meant that he could move to Babylon. This was an important truth to communicate to the exiles, who may have believed that God lived in one place, hundreds of miles away in Jerusalem.
Furthermore, the ‘eyes’ on the rims of the wheels tell us that God can see everything, everywhere. It’s a very meaningful picture. No wonder Ezekiel was overwhelmed with the vision and fell to the ground.

Summary: yes the throne has wheels to symbolise that God is with His people, even when they are not near the temple. But, no, they are not literal. God is speaking to Ezekiel in a vision which he and the people he preached it to would immediately understand and draw comfort from.
For more information see this page which quotes directly from David Pawson's Unlocking the Bible Omnibus.