27x1 3/8" tires are on my bike. I got them on closeout for almost nothing, with the brand name ground off, and the pressure ratings in bars rather than psi. They seem decent enough. They do feel a bit slower and softer than 1 1/4" wide tires. But not so much to motivate me to change them over the last year. New tires in this size do seem pretty hard to come by these days.