I have them on my Americano. They haul me around with no problems. The one caveat about them is
that they are such a deep V section design, you must use tubes with long valve stems or extenders.
Since they are a fairly wide cross section, it can be difficult to find appropriate tubes. I've been using
25mm tubes with 35mm and 40mm tires. No problems to report, but I'd still prefer larger tubes if they
were easier to find.