Wow, and I thought I was the only one with pum problems! Personally, I have found the pumps with the "smart" heads to be basically worthless. I have a Planet Bike ST with the "smart" head that will attach to both Schrader and Presta valves, but leaks above 90 psi. I thought I would be wise to spend the big bucks and get a Topeak Joe Blow Pro, and it also will not go past 90 psi on Schrader or Presta valves.

I purchased a Silca Pista, and could not be happier with a pump for my bikes with the Presta valves, but the screw on attachment for the Schrader stems is a POS and leaks at very low pressures. So far the only pump I have that really works for the Schrader valve stems is a cheapo "Tech Team" that I bought at Target or K-Mart but only fit Schrader valves, but I've had it for 5+ years and it still pumps great and will let me pump up to 120 psi (I don't go any higher) on the Schrader valves.

The only down side with the Silca pump was me learning how to disconnect it from the valve stem. I learned the hard way that I needed to rest both of my palms on the tire, place both thumbs on the pump head opposite of each other, and then press then head evenly to push it off the valve stem. When I tried any other method of disconnecting, POW, and I ripped the valve stem off the tire...making me not a very happy camper. But since I learned a safe method of pump head disengagement, I think the Silca pump head style is the greatest for Presta valve stems.