IN regards to universal heads, I have been using my universal head Specialized pump for two years, I use it on my car, motorcycle and bicycles. Two bikes have Presta valves, one Schraeder, and of course the car and motorcycle are both Schraeder. I use the pump very often since i check my car's tires at least weekly and the motorcycle almost every time I ride it. I use the pump on the bikes at least a few times a month. The pump works just as it did when I bought it. No issues with either type of valve.