I have 700x 32mm tires now. I run them at around 110 PSI. I was told the firmer the better and it even helps reduce the number of flats. The tires are rated for 110 max psi. (Bontrager Race Lites hard case). I am concerned as well with what Danno said about the threads becoming worn. Bottomline is that I have to find an expert wheel guy and let him do his thing. Looks like I am a day late and a dollar short on the wheel truing/maintenance class. Man...that would have been great. Oh well....next time. But...hmmm....then again....I have a group of friends who are really into biking but not mechanics by any stretch. I know they would be interested in coming. I can host and provide the vittles/refreshments. Any really knoweldegable wheel guy on here in the SF bay area want to do one of those again in the next month or so? I could pull in probably another 6-10 folks on my own who would be interested.