Tyre deflating…

[NRG1976]

Any ideas why a tyre would slowly deflate (say 2.5 bar to 2 bar) over a couple of weeks or so?

I’ve had this ongoing issue for the past few months on the other half’s car (front passenger side tyre) and following a puncture on the drivers side front I had both fronts changed (dunlops)…thought that might resolve the issue but the slow deflation continues on the front passenger side tyre!

TIA

[Scrump]

May be corrosion around the inside face of wheel rim or the hole for the valve.

Spray soapy water around the rime and valve, you may see the leak causing bubbling.

[sherman]

The air valve is faulty.
The tpms valve is faulty
The tyre was not seated onto the rim fully.
Posibilities are endless without someone looking it over properly

[ARHarh]

Just go to your local independent tyre shop and ask them to have a look, chances are the rim just needs a quick whip round with a wizzy wheel wire brush and the tyre putting on properly.

Or you could have porous rims, but unlikely.

[markiii]

that

[NRG1976]

ARHarh said:

Just go to your local independent tyre shop and ask them to have a look, chances are the rim just needs a quick whip round with a wizzy wheel wire brush and the tyre putting on properly.

Or you could have porous rims, but unlikely.

Thanks, Halfords mobile fitting came out to do the tyres, so will raise with them first, as assume if there was corrosion preventing the tyre from forming a good seal they should have resolved?

[sherman]

NRG1976 said:

ARHarh said:

Just go to your local independent tyre shop and ask them to have a look, chances are the rim just needs a quick whip round with a wizzy wheel wire brush and the tyre putting on properly.

Or you could have porous rims, but unlikely.

Thanks, Halfords mobile fitting came out to do the tyres, so will raise with them first, as assume if there was corrosion preventing the tyre from forming a good seal they should have resolved?

It wont be corrosion. It would have been old sealant not properly wiped off that prevented a decent seal this time.
Your mobile fitter will not have cleaned it properly.
Do you trust him to do it properly this time?

[E-bmw]

NRG1976 said:

Any ideas why a tyre would slowly deflate (say 2.5 bar to 2 bar) over a couple of weeks or so?

Air is escaping would be my best guess.