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Hi, Does anyone know of inner tube Shrader valve cores that do not leak air?  Seems most cores leak air to a small degree, as I have to pump my tires every ride.  Just wondering if there are cores on the market that are best at holding the air.  Thanks!

9 comments

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bechdan [232 posts] 1 month ago
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Are you sure the core is leaking? Try submerging it in a sink and check for bubbles.
Some tubes are more porous than others so might just need to get thicker tubes.
If the core is definitely leaking then you should be able to sort it with some PTFE tape, around the threads and around the core bung.

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hirsute [905 posts] 1 month ago
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Sounds like you have a puncture.

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brooksby [4585 posts] 1 month ago
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If you are having to pump up your tyres before every ride then I'd vote with hirsute and say you're far more likely to have a slow puncture going on rather than a fault with the valves.

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oxford_guy [10 posts] 1 month ago
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Silca do sell premiun valve cores, but only for Presta valves: https://silca.cc/products/replacement-presta-valve-core-set-of-4

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Canyon48 [1146 posts] 3 weeks ago
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How much do your tyres deflate and how often do you ride?

My conti tubes lose about 5-10psi if left for a week. My Vittoria latex tubes lose 10 PSI overnight.

It's normal for any innertube to deflate a little - the thinner they are, the more they deflate.

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BrokenBootneck [275 posts] 3 weeks ago
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Bloody hell and I thought tubes were apparently great and trumped tubeless for this reason. I pump up my commuter once a week use it Monday to Friday and lose about 15psi do max on my tubeless sector 28s. 

 

Still cant see me going back to inner tubes. 

 

Sorry I know none of this actually helps. 

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Spangly Shiny [261 posts] 3 weeks ago
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Pilot Pete [145 posts] 3 weeks ago
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BrokenBootneck wrote:

Bloody hell and I thought tubes were apparently great and trumped tubeless for this reason. I pump up my commuter once a week use it Monday to Friday and lose about 15psi do max on my tubeless sector 28s. 

Still cant see me going back to inner tubes. 

Sorry I know none of this actually helps. 

What, tubes lose 5-10psi a week and your tubeless lose 15psi and you are selling it as a plus point for tubeless? I don’t get your logic.

PP

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BrokenBootneck [275 posts] 3 weeks ago
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Pilot Pete wrote:
BrokenBootneck wrote:

Bloody hell and I thought tubes were apparently great and trumped tubeless for this reason. I pump up my commuter once a week use it Monday to Friday and lose about 15psi do max on my tubeless sector 28s. 

Still cant see me going back to inner tubes. 

Sorry I know none of this actually helps. 

What, tubes lose 5-10psi a week and your tubeless lose 15psi and you are selling it as a plus point for tubeless? I don’t get your logic.

PP

 

well I pump them up to a max of 80psi and have riden them at 40psi so it makes no difference.

If you are pumping up your tyres once a week does the fact i’ve lost an extra 5psi make any difference?

 

used to run them at 60 but normally in 75/70 now.  

3 years of running tubeless, once on my very first puncture I put a tube in. Didn’t really know what I was doing. I commute every day including extended commutes always through Southampton every day past all the student accom and  broken glass this is one either pro ones or sector 28s  

Have used noddles a few times even in a sidewall cut that got me home and lasted the week commuting. 

 

 

Sorry i seem seem to have started a tube v tubeless debate. But my valves are fine and I’ve not really had any isssues. 

 

There that should fix it.