Originally Posted by
jawchops
Hi folks: I installed a new tube in my road bike's rear tire, but I cannot inflate the new tube. It's a presta valve. I unscrew the nut at the top of the valve, but cannot seat the pump on the valve. Also, when I push on the nut, there's no telltale "psssht". So, I don't know if there's something wrong with the valve, or it's user error. Any tips would be greatly appreciated!
Is the valve long enough that it sticks out of the rim far enough? Valves come in different lengths and if it is too short the pump won't grab it. If this isn't the issue, take the tube out and try inflating it and see what happens.