Tyres

[Dead Eye]

Now the whole "which tyre, what pressure" thing has been done to death, so this is not what this thread is about, thank god.

I have a relatively fast leak on the rear tyre (a day ride out will easily see it drop from 40psi to below 10). I can't see any evidence of a puncture and I haven't time to fully investigate it further at the moment. But I don't recall hearing any hissing etc. It was suggested that maybe the valve was the issue.

Now the real question is, is it actually possible to replace the valve yourself?

[Slaninar]

Now the whole "which tyre, what pressure" thing has been done to death, so this is not what this thread is about, thank god.

I have a relatively fast leak on the rear tyre (a day ride out will easily see it drop from 40psi to below 10). I can't see any evidence of a puncture and I haven't time to fully investigate it further at the moment. But I don't recall hearing any hissing etc. It was suggested that maybe the valve was the issue.

Now the real question is, is it actually possible to replace the valve yourself?

The valve has a "needle" in the middle. And a sealing rubber. Those things can be replaced, sometimes the leak is there. To test it, just spit on your finger, smear it on the top of the valve and see if bubbles appear.

However, there can also be a small puncture in the valve itself. When it gets old, the rubber begins to crack. To change the whole valve, you cut it off, put a new one in with that sealing glue used for sticking tyre to the rim. Garages here do it for about 2 euros.