In the rain, the smoother tire is theoretically better than the knobby mountain style: more tread touching the ground at any given time, so better traction. Also, because the street tire is thinner, there is less traction so a more efficient ride. Am I the only one to sense a contradiction here? Must be quantum mechanics
So I pull a tire off, put the new one on and grab the pump.
I can't believe it, I had a schrader pump and presta tires. Dumb.
I could put the old tires back on and bicycle to a store, but they're not open yet, and besides, I'm philisophically opposed to backtracking of any kind. So I find a co-worker who's an avid cyclist. As predicted he has a compact presta pump with him which I borrow. An hour of pumping later my tires are just half full (I'm thinking, do I not know how to use a pump?), so I just walk to the bus stop, then walk again home, where I have an adaptor. Finally the tires are full. Time wasted: 2 hours