The wheels to avoid are the Wodent Wheel and wheels made for hamsters.
The safe glider wheels are the Stealth, Fast Track, Custom Cruiser, H-Wheel and Raptor.
These are open wheels with no center axle. Their construction is similar but they have different bearings that the wheel spins on.
I have 6 stealth wheels in my 3 cages - they have been used for 7 years and are good as new and still silent.
I have links on my web page to help you locate the vendors.
http://www.gliderkids-diet.com/FAQ.html