Tire Size For Schawla 220 What tire size will fit a Schwala Xero 220 rim?  Can it take any 700C tire?

I am having trouble figuring out what size tires could possibly fit this rim: http://www.formulahubs.com/en/xero/?method=detail&amp;aid=17.  The closest I see is this rim size: 700C*20*19MM.
You won't be able to use ANY 700C tire, but you should be able to use anything between 700Cx19 to 700Cx25.

Sheldon Browns site has a ton of information on tire sizing. In general he recommends 1.45 to 2.0 times the inner rim width.  In your case this appears to be 13mm.

http://sheldonbrown.com/tire-sizing.html