I have a $15 (I think) one from Target. It's for Schrader, but works well enough to pump up the tire to 80 psi or so. There may be a Presta adapter, I don't remember. I haven't suffered any equipment malfunctions yet, and the head attaches much better than my Topeak mini pump. Why not get a couple of cheap ones, one for each type of valve? Usually things built for one purpose work better than multifunction products You may be better off with two single-purpose products that can be bought at half the price of a good dual-purpose one.