I used to ride a beater mountain bike around town. Now I have a new road bike and am trying to inflate the tires. So I've got my nice pump and pump it up to 100 psi. And I can't get the pump off the tire! I worked it off a little bit, but it's not gonig any further. There's gotta be something simple that I'm missing. I feel pretty stupid sitting here with a bike in my room with a pump attached.
So you would just unlock it (which you expect to be straight out), and the pull the head straight out?
I'm thinking maybe the screw part of the valve is stuck in the pump head somehow. Bleh...
Thanks for replying.
So out of desperation I brought the wheel and pump to the bike shop here. Predictably, the pump came right off. I then pumped it up again, and once again the pump came right off. I guess this is just one of those things.
On my pump, you lift the tab to lock it to the valve, then lower it back down (like in the first picture) to unlock it. However, the plastic ring around the nozzle is like a screw. When you lift the tab, a cam compresses a piece of rubber so that its diameter gets smaller and grips the valve. But if when you lift it it still doesn't grip, you can adjust the pre-tension on the piece of rubber by turning that ring so that the final locked diameter of the nozzle is a bit smaller.
It could be that the thing was adjusted so that the diameter was the "locked" diameter before you even engaged it.