Mysterious flats

[Iain G]

Has anyone suffered a flat on a inner tubed tyre & found no puncture? It's happened to me twice now since getting my trike in late December.The first one I'd had a puncture in January which I'd repaired & checked the inflated inner tube submerged under water & it was showing no leakage. The tyre I repaired went down the following day so I removed the patch on the inner tube & applied a new one (it's stayed inflated so far). Since then I've put stans no tubes in all 3 tyres so I thought I'd be safe but to my surprise the second happened on Sunday. The inner tube had never been repaired before & there was no visible puncture so I put another dose of Stans in for good measure. Is there a explaination for this happening?

 

[Haz]

Recently I had some mysterious flats which turned out to be a broken valve, so just replaced the inner tube entirely.

 

[Gravity Aided]

Check the inside of your tire rim .There may be a burr from the metal finishing process that may be causing this. Just a guess, but it has happened to me. Also check inside your tire for embedded things that may cause recurring punctures.

 

[raindog]

sounds like valve trouble

 

[youngoldbloke]

sounds like valve trouble

Also check the junction where the valve meets the tyre. I had a tube that appeared to be perfectly airtight until you flexed the valve and a crack opened up at that point. When flexed the tube showed no sign of leaking.

 

[Iain G]

Thanks for the advice guys

 

[The Over 40 Cyclist]

And I wouldn't bother with patches. Tubes are relatively cheap online now, and I just throw them away. For the $3 or so that a tube costs I'd rather not take the risk that a patch lets me down on the ride.

 

[ianrauk]

Applied correctly a patch should not let you down or fail.

 

[Andrew_Culture]

I've had a few when tyres are very worn and have only solved them by replacing the tyre and the tube.