As above, the tyre pressure on one of my rear alloys keeps dropping down to 19psi over a period of about a week and then will just stay at 19 for how ever long you want it to

Whats most likely causing this?

It is an old poop tyre that i got when i got the alloys, something not sealing right? slow puncture?

could be a slow puncture or a slightly mis-shapen wheel? Or even an old wheel that's gone slightly porous?

could be a slow puncture or a slightly mis-shapen wheel? Or even an old wheel that's gone slightly porous?

I have this problem with one wheel i think I'm going to get the tyre taken off and clean the inner rim then get it put back on again ..

I'm at the petrol station every 3rd morning ...

Most likely cause is a slow pucture or the tyre is not sealing correctly on the rim. Take it to a tyre place and ask them to check the tyre and re-fit it with sealant rather than just soap, then if it is leaking round the rim this will sort it.

Sal. x

yeps as sally healey said if they are alloys they are probably slightly corroded and need cleaning up and resealing, make sure if u have it done they dont just use white soap as this is just lubricant and not sealant.

Ideal time to strip the tyres off then and give them a refurb if they need one!