Clamp the wheel down on a good cross-slide table and start with a drill bit slightly larger than the current hole, running at high speed. Step-drill the hole up a little at a time until it gets round.

I'll second the motion for new wheels!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!