This is a weird one

Chips Lovell

I mentioned on the broomwagon earlier about my rear tube suddenly deflating around 20 minutes after getting home from a spin. Well I just noticed that both tubes went. Haven't had time yet to pull the tyres off to examine the damage, but what on earth would cause two tubes to simultaneously go like that?

blorg

A puncture of some sort I am suspecting.

zzzzzzzz

el tonto wrote: »

I mentioned on the broomwagon earlier about my rear tube suddenly deflating around 20 minutes after getting home from a spin. Well I just noticed that both tubes went. Haven't had time yet to pull the tyres off to examine the damage, but what on earth would cause two tubes to simultaneously go like that?

Is your other half annoyed you went out for a spin in the middle of the day when you should be assembling furniture?

Paulyh

maybe you suddenly travelled through time, and air in your tyres seeped out it a normal rate.

Otherwise i'm not quite sure.............maybe check the valves?

Oh wait, were you being chased by the police? they could have deployed a 'stinger'??

Lumen

When you say "tubes" do you mean tubulars?

CheGuedara

el tonto wrote: »

I mentioned on the broomwagon earlier about my rear tube suddenly deflating around 20 minutes after getting home from a spin. Well I just noticed that both tubes went. Haven't had time yet to pull the tyres off to examine the damage, but what on earth would cause two tubes to simultaneously go like that?

Cycling through a bike ninja vs bike pirate fight?

Morgan

Do you own a parrot?

https://www.youtube.com/watch?v=ztx3CHuEXdg

Chips Lovell

aidan.offbeat wrote: »

Is your other half annoyed you went out for a spin in the middle of the day when you should be assembling furniture?

Not guilty. She was at work;)

Lumen wrote: »

When you say "tubes" do you mean tubulars?

No, thank god. The inner tubes on clinchers. Both latex tubes, one over a year old, the other fitted just before this spin.

DirkVoodoo

Ok, so I don't know much about tubulars, but both tyres going down I would have thought maybe you hit a little pothole or a patch of glass?

Chips Lovell

DirkVoodoo wrote: »

Ok, so I don't know much about tubulars, but both tyres going down I would have thought maybe you hit a little pothole or a patch of glass?

But if I'd hit something surely they would have gone down straight way or shortly afterwards. Both just suddenly blowing while the bike is sitting in the hall is very odd. Not tubulars by the way.

DirkVoodoo

el tonto wrote: »

But if I'd hit something surely they would have gone down straight way or shortly afterwards. Both just suddenly blowing while the bike is sitting in the hall is very odd. Not tubulars by the way.

It wasn't leaning against a radiator or anything?

blorg

Hmm. The other alternative besides a puncture is probably the incompetence of the mechanic who installed the tubes.

Chips Lovell

DirkVoodoo wrote: »

It wasn't leaning against a radiator or anything?

No, but the temperature thing has occured to me. It was a very cold morning and average temperature was 2 degrees on my spin and the bike was brought into a very warm house. But should that cause them to go?

blorg wrote: »

Hmm. The other alternative besides a puncture is probably the incompetence of the mechanic who installed the tubes.

I'd assumed that it was my fault when I thought it was the newly fitted rear tube, but the front one was on there for a year or more.

Captain Havoc

el tonto wrote: »

But if I'd hit something surely they would have gone down straight way or shortly afterwards. Both just suddenly blowing while the bike is sitting in the hall is very odd. Not tubulars by the way.

Maybe there was a microclamatic mini heatwave in your hallway causing the air in both tyres to expand and blow.

Lumen

el tonto wrote: »

But if I'd hit something surely they would have gone down straight way or shortly afterwards. Both just suddenly blowing while the bike is sitting in the hall is very odd. Not tubulars by the way.

I've had this a few times, although not with two at once.

I suspect that as the tyres cooled down (or warmed up) the inner tubes shifted in the tyre, exposing fresh cuts made by some lodged glass fragments.

blorg

Best to look at them and see. Did they blow out with a bang or just suddenly lose pressure? Blowouts with a bang (sometimes when pumping but also after quite a while cycling) have happened to me due to failure to seat the tyre bead properly. I think the same can come from pinching the tube which I believe is easier to do with latex ones.

The front could just be a coincidence from a regular puncture.

Chips Lovell

Not a bang, but a very load hiss, like they pretty much deflated instantly.

I guess I won't have a good idea until I take them off later on.

irishmotorist

el tonto wrote: »

But if I'd hit something surely they would have gone down straight way or shortly afterwards. Both just suddenly blowing while the bike is sitting in the hall is very odd. Not tubulars by the way.

I vote for aforementioned patch of glass, but directly outside your gaf.

copacetic

Mrs. Peacock in the hall with a spanner?

papac

Both just suddenly blowing while the bike is sitting in the hall

During the very cold spell in January I pumped my bike tyres up really hard outside in the cold.I had to drive 10k to find ice free road for spin. Tyre exploded as I drove and nearly gave me a heart attack . I put it down to temp change.(Really hot in car due to wife being part lizard).
Sounds like you may have had same thing.

EDIT. Pressure/Temperature is a constant. If you pump a tyre up to 120psi at 0 degrees centigrade (273 k) the pressure will be 130psi at 25degrees centigrade.(298 kelvin). God I need a life.