I have a set of 27" Wobler Super Champion rims laced to some Specialized (Suntour) 36 hole Sealed hubs. They ride very nicely. The only issue I had so far was that I broke a spoke in the rear wheel and the closest shop did not have any replacements long enough to fit the wheel. I have never had a problem w/ tire selection though. Schwalbe still makes a number of offereings in 27 inch as do others. I run them at 90 psi and they work great.