And the 1.6 inch 40mm version would be great for using a lighter load than I had, and being even lighter than the 2inchers, they would add to a bike setup of someone going quicker overall.
I rode 28mm slicks over dirt alot and wouldn't hesitate using the 40s on a variety of surfaces, within reason of course.
I run the 42-406 version on my folding minivelo tourer. Great tire.
CC-Touring Bali...
I also have the 37mm width ones in 622 size.