Idiot on a Presta valve

Thebigbee

Hi - I have replaced a rear Presta valve recently. Went to give it some more air and realised that for whatever reason I could not undo the lock nut - on the end of the valve - whatever I tried.

I eventually took some pliers to it - that didn't help and I got pi55ed off and cut the tip off thinking that would help and I could push the valve through.

Obviously I can't as i can't release any air! - What a moron I am.

Any suggestions for getting the now buggered valve out of the tyre?

All advice greatly reiceved - cheers!!

davis

Well, you've probably destroyed a valve, and with it, a tube.

You could try:

Cutting the valve off completely. I've never tried, but I'd have thought a beefy pair of pliers could cut through it, then re-round it again.

Taking the thinnest needle/pin to the tyre, so that the tube deflates.

Calming down, and having a cup of tea :-)

Blue Meanie

+1 Davis
Hmm "a cup of tea"
Sometimes parts break. Sometimes you crash. Sometimes it’s your fault.

Thebigbee

I have spare tubes so that's no problem. It is just getting the air out of this one so I can replace it without buggering the tyre?

Phil_D

A hacksaw through the base of the valve should do it. Or a nail

wgwarburton

Surely you can push the valve core down and let out the air? A carpet tack or similar pointy thing should push the inner bit down.
Cheers,
W.

MichaelW

Since the inner tube is now toast, you just need to deflate it, remove the tyre, cut off the valve from the inside and fit a new tube, this time with a smear of vaseline or grease on the threaded nut.
To deflate a tyre, use the traditional method, poke something pointy through the tyre.