I ran 28 Corsas on my hayfields @ 90ish psi for around 1000 miles, they were well used before I did and the treaded band became unattached in the end. Don’t know if that was the stretch or just they were knackered. But they stayed on and up the whole time.
What's the skinniest slick tyre you can actually buy that would safely fit a 650B w/ 25mm internal rim width.
Same question for the 700C Hayfield wheels on a Sequoia, they're 622 x 26