Old style clincher tires. Michelin "Elans" in particular. But, IRC gum walls as well. And "Schwinn" size tires, what a stupid, stupid idea. Also, backwards front derailleurs, you know the ones that when you PULL the lever, they shift down! Totally asinine. Cable breaks and it shift you into HIGH gear. Moronic. I love the brifters on my Mercier, and my spd pedals. But, I still have toe clips, and Campy pedals on my Austro Daimler.