Very odd flat

[jack smith]

saw i had a flat on the rear yesterday took it out tonight and the tube isn't punctured but it looks like this when inflated, any idea what's caused it?

 

[Smokin Joe]

Just a section of tube where the wall thickness is a bit thinner.

 

[youngoldbloke]

Blowing it up outside the tyre? Seriously though, is it leaking? Must be a manufacturing fault.

 

[fossyant]

Latex tube - they go flat after a few days you know !

 

[steve50]

Your tube has an aneurysm

 

[jack smith]

It's only got one pump of air in, I just put a pump in before sticking it in the tyre and all the air rushed to one spot! I've used later tubes for well over a year they've never gone totally flat before they usually just loose abit of pressure over a few days.

 

[jowwy]

Ghost flat

 

[jack smith]

Nah it's gone back down again overnight very odd better get a new tube

 

[Supersuperleeds]

Blowing it up outside the tyre? Seriously though, is it leaking? Must be a manufacturing fault.

If your going to patch a tube you need to pump it up outside the tyre to find the hole?

 

[Supersuperleeds]

Nah it's gone back down again overnight very odd better get a new tube

Chances are it is a dodgy valve, pump it up and put it in a bowl of water and you will soon tell.

 

[jack smith]

I have nothing's coming out anywhere this is the second time I've had a look.

 

[youngoldbloke]

If your going to patch a tube you need to pump it up outside the tyre to find the hole?

Yes indeed! I have noticed that some latex tubes do appear to have varying thickness, and a tendency to do as the OP's if you put too much air into them outside the tyre. Have also had faulty valves which were fine until the area around the junction between the valve and the tube was stressed by the valve being pushed through the rim, causing mystery loss of air.