Instantly deflated

[Dave 123]

Got the bike out of the garage at 8.15 this morning, gave both tyres a squeeze. The rear one was a bit soft so I got my track pump, bent down to undo the dust cap, and the whole valve came out of the rim like a shot. The top of the valve was stuck inside the dust cap. I managed to unscrew the cap and valve, then rethread it, pump up and away I went.
I had a "one of those days" feeling, but n the end I had a cracking Cambs/Essex ride with my mate Stuart.
Never had this happen before, have you?

 

[HovR]

Do you mean the valve core came out with the dust cap? Strange.

I don't bother with dust caps on presta valves - I just find them an inconvenience when I pump up the tires.

 

[snorri]

Yes.
I sometimes tighten the valve gently using a pair of long nose pliers to prevent a recurrence.

 

[User6179]

Got the bike out of the garage at 8.15 this morning, gave both tyres a squeeze. The rear one was a bit soft so I got my track pump, bent down to undo the dust cap, and the whole valve came out of the rim like a shot. The top of the valve was stuck inside the dust cap. I managed to unscrew the cap and valve, then rethread it, pump up and away I went.
I had a "one of those days" feeling, but n the end I had a cracking Cambs/Essex ride with my mate Stuart.
Never had this happen before, have you?

Was the tube a continental , the cores on contis seem to come loose, make sure you test it in water after tightning as it could go flat mid ride as mine did yesterday .

 

[raindog]

Yes.
I sometimes tighten the valve gently using a pair of long nose pliers to prevent a recurrence.

+1
just screw it back in nice and tight.

 

[Dave 123]

The whole lot blew out......... so I screwed it back in.
It was fairly impressive. Not sure what tube. It was good for 50 miles this morning.

 

[smokeysmoo]

It was fairly impressive.

I'm sure my front tube on the track bike was equally impressive when it exploded at some point in the past 18 hours, blowing the tyre off the rim at the same time

I changed the tyres yesterday, re-fitted new tyres, inflated them, and put the bike away. Just been to the shed and saw the front was very flat, assumed I'd pinched the tube, then saw the tyre hanging off the rim on the other side! The tube has given out along it's seam

As for valve cores, it happens to me occasionally, I too nip them up with long pliers, and after I've done that I've never had one come loose again

 

[Norm]

A valve core tool costs about a quid and works much better than long-nosed pliers. I've never had to revisit any that I've nipped up with the proper tool.

 

[Fnaar]

Had it happen a couple of times with Vittoria tubes. Always give them an extra turn now just in case.

 

[smokeysmoo]

Always give them an extra turn now just in case.

I had heard you're partial to the occasional nipply tweak Fnaar