Before moving to MI I was living in Louisville KY and commuting about 4 days a week 3.8 miles one way. Now that I live in MI my commute has changed to about 28 miles one way (a dramatic difference). My bike is a 98 CDale M500, not the greatest bike but it was cheap, it fits well and I enjoy riding it. I swapped out the knobby mtn tires when I got it and put on some fat slick type tires that are pretty wide and do not hold a lot of air pressure. The rims are Sun AT18's 26". From the information I can find they look to be about an inch wide (I may be wrong but its hard to find information about the exact rim; 98 compared to 2010).

What is the narrowest tire I can run on these rims?

I would like to get as narrow as possible in a gatorskin or something of that nature so I can decrease rolling resistance and increase my pleasure factor in the commute.

I'm thinking either of the following

http://www.biketiresdirect.com/pcocu...6_inch)/pp.htm
http://www.biketiresdirect.com/pgfst...er_tire/pp.htm
http://www.biketiresdirect.com/pscm2...26_tire/pp.htm


Help me out!