Most of my go to roadbikes are vintage 27", so another shout out for Swift Tire Sand Canyons in 27x1 3/8. They are only available via the Swift Tire web page I think... Not Schwalbe thick and uber strong, but for me, lighter and more supple for a better ride on my local bike path and fine gravel rail trail. Those or the Panaracer offerings in 2 smaller 27" sizes. For my bikes, $36 for Sand Canyons isn't terrible in today's market for what you get. And yes, I also hapilly run Kenda K40 gum walls on a motobecane mirage (beater bike) because they are always available when I need tires.