Circumnavigation of Oz

I have some Enduro tubes in one of my road bikes.

I had a valve rip out of a tube 3 weeks ago. My confidence in tubes is waning.

Paul
 
I have had a couple of fast deflations, you go into a bend and the bike feels odd and you steady up slowly felling the second bend and by then I was pulling over. I had one of those external 90-degree tube valve extensions fitted to the rear constantly for years and then 2 weekend day rides it would break the seal and let the air out going from 40 psi to 10 in a couple of minutes. It took a while to work out why this was happening. It's now not fitted.
 
Vince said:
I have had a couple of fast deflations, you go into a bend and the bike feels odd and you steady up slowly felling the second bend and by then I was pulling over. I had one of those external 90-degree tube valve extensions fitted to the rear constantly for years and then 2 weekend day rides it would break the seal and let the air out going from 40 psi to 10 in a couple of minutes. It took a while to work out why this was happening. It's now not fitted.
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What was the problem with the 90 degree valve?
It is almost impossible to get light weight tubes now, all heavy duty truck grade items, shitloads more unsprung and gyroscopic weight. I use 3.50 tube in my 130 rear and 110 front race tyres on advice from other racers, never been a problem.
 
I dont know, it was fine at lowish speed but the usual ride, The Old Rd required a 15 minute run up the Gasford Expressway and it would just leak air once the bike cracked 100kph and more, it started to weave a bit on the expressway and feal loose on the first exit bend and by the time I arrived at the fuel stop the rear tyre would be almost flat. It worked fine for years and suddenly this started. Once removed it was back to holding air.I fitted it cause on rear spoked wheels its almost impossible to use Garage tyre inflaters as most have a long straight steel tip that won't fit the tyre valve. I now have a compressor at home with a connection that fits
 
Hi Guys
            Inner tubes have been around since the invention of the pneumatic tyre and are, if correctly fitted, extremely reliable. The manufacturers recommend replacement at the same time as the tyre because friction between the tyre and the tube wears them thin. That's all the dust in there. Obviously nobody ever bothers. Paul, if you've ripped the neck off a tube (obviously the rear) then something is amiss. Security bolts were fitted as standard on most big British bikes from the mid fifties and cured the tyre moving on the rim problem in a stroke. Dunlop invented or perfected them and I can remember seeing them being made as an apprentice there. All modern dirt bikes use them. The big problem, though not unsurmountable, is balancing the wheel afterwards for road use. They are made in various widths to suit the rim and it's important to use the right size to clamp the tyre. All tubes are now made from synthetic materials, the same as tyres, and rubber went out of the window years ago.
            Our beloved Laverda's were at the end of tubed and beginning of tubeless technology which is why they machined the rims as they did i.e. they didn't want the tyre to collapse off the seat in the event of a puncture. I think they did a pretty good job of it. All the major tyre manufactures make their own tubes and are far superior to the far eastern offerings. The downside is they are twice the price. The reason I suggested off road tubes is simply that they are designed to resist pinch and pierce punctures. Make sure you use the right size.

Happy and Safe New Year to you all.    Bob
 
Yes Bob, the quality of the tube was amiss.

Checked the pressure and put in a couple of hundred grammes.
Took the bike out 3 days later and after 20 km, it lost its air at the back.

That inner tube had done 8000 km before that.

Paul
 
Vince said:
I fitted it cause on rear spoked wheels its almost impossible to use Garage tyre inflaters as most have a long straight steel tip that won't fit the tyre valve. I now have a compressor at home with a connection that fits
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You can buy 90 degree extension/adapters cheaply enough. I never go out on a ride without one in my pocket and generally keep another in the tool tray..
 
Tippie said:
Does air pressure hold things against the side of a receptacle, Cam?
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No, it doesn't. That's why the rubber band inside the tyre would be free to float around without a tube to hold it in place. But the sealing tape is somewhat different. Basically it's stuck over a hole and sealed around the sides so there's high pressure on one side and low pressure on the other. It acts a bit like a flapper valve. That was my assumption anyway.

Here's a practical application: If you have a window blow out in an aeroplane at 30,000 ft, just shove some fat bastard against it. The internal pressure will hold him against the hole and stop the cabin depressurising. And he doesn't even have to be adhesive.  :D
 
Now I know why some people prefer to sit near or beside fat bastards on planes.
I prefer a bit more room myself, but it now makes sense after all those years wondering.
 
DavidH said:
Now I know why some people prefer to sit near or beside fat bastards on planes.
I prefer a bit more room myself, but it now makes sense after all those years wondering.
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I would start sitting next too them now... odds are higher, if nothing has happened so far, it could happen in the future... :LOL: :LOL: :LOL: :LOL:
 
DavidH said:
Now I know why some people prefer to sit near or beside fat bastards on planes.
I prefer a bit more room myself, but it now makes sense after all those years wondering.
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In case of a crash, you die smothered rather than burnt.

Paul
 
BobSol said:
  Inner tubes have been around since the invention of the pneumatic tyre and are, if correctly fitted, extremely reliable. The manufacturers recommend replacement at the same time as the tyre because friction between the tyre and the tube wears them thin. That's all the dust in there.    Bob
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This can be minimized by a dusting of baby power on the tube before insertion. Prevents chaffing.
 
Dellortoman said:
Here's a practical application: If you have a window blow out in an aeroplane at 30,000 ft, just shove some fat bastard against it. The internal pressure will hold him against the hole and stop the cabin depressurising. And he doesn't even have to be adhesive.  :D
Click to expand...

And why did this just pop into my mind? https://unclestinky.wordpress.com/tag/american-graffiti/
 
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