those wheels http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT won't fit on to drill motors directly but the Robo Challenge €˜Blue wheels€™ with nut insert. will. http://web.me.com/robochallenge/Robo_Ch ... nical.html (3rd down)
the ebay wheels are cheep so you could buy them and use them for something else.