Originally Posted by
randyjawa
You will have no problem at all. I, personally, do prefer 1 1/8" for looks and performance but they are best only if mounted on appropriate rims, such as the ones one of the OP's bikes.
As for availability, it is rare that a set cannot be found on Ebay. In fact, a quick search I conducted just now produced 100+ listings. Go for the Panaracers Pasela - good 27" tire, in my opinion.
I second that. I was getting flats all the time because most of my riding is urban. I got the Pasela TourGuards and havent had a flat in over 2000 miles, and I've run over some things and hit some potholes I would really rather have avoided. I also like that the gumwalls look like the original tires.