I prefer the nonthreaded ones, but the only ones that I've gotten locally without the threads are Novara. I've heard some stories about them not being so strong around the area where it connects to the tube and them breaking there. In fact, I've been through some because of that, but none while riding strangely enough. In fact today I just replaced my front tube because it still had a threaded stem on it...the pump would NOT separate from it and I put just too much force on it, tearing the stem out. < Noob.