At my first Cino, I had three chainring bolts work themselves loose and fall out. I didn't notice it (though I did notice that I was having shifting trouble) but fortunately Sunday morning DD noticed it and he and Northbend pointed me to a guy, who's name I can't recall, who had a box full of spares. Those bolts got a drop of Loctite once I was home.

On the tire subject, I've ridden Cino twice with tires that measured 26mm wide. While it is better on wider tires, I had no problems with the smaller ones.