Strange air inflation from tire on BMW X5 - R19 wheels?

[vladc77]

I have an annoying and strange problem with my wheels or tires. Both rear tires slowly loosing air. It takes about 4-5 days to loose air from 3.9 PSI to 2.8. I always need to pump the air up. I went to discount tires to check if I have any hole. They did not find any. They even could not find any leak at all. I finally put new set of Toyo tires hoping that the problem will go away. After some time, I am getting the same problem and have no any ideas on how to solve it. The only thing that coming from my mind that leak happening from the wheel on the sides where tire is. I have BMW chrome wheels. I am wondering if someone had similar problem and found an easy way to fix it. Any advice is highly appreciated.

[powers1]

Originally Posted by vladc77

I have an annoying and strange problem with my wheels or tires. Both rear tires slowly loosing air. It takes about 4-5 days to loose air from 3.9 PSI to 2.8. I always need to pump the air up. I went to discount tires to check if I have any hole. They did not find any. They even could not find any leak at all. I finally put new set of Toyo tires hoping that the problem will go away. After some time, I am getting the same problem and have no any ideas on how to solve it. The only thing that coming from my mind that leak happening from the wheel on the sides where tire is. I have BMW chrome wheels. I am wondering if someone had similar problem and found an easy way to fix it. Any advice is highly appreciated.

I dont see it being anything but the wheels not sealing the tyres properly.Did you kerb them or went in a hole or similar situation?
Unless its the wheel valves leaking,but they should have replaced these when you fitted the new Toyos.

[bgsquad]

I have the mysterious air loss as well on my 4 tires, all equally! i would have suspected the wheels, but how come the 4 are losing the same? i inflate to 2.2 and after like a month, they drop to 1.85 (equally).... I have the Vreds and the 18'' '01 sport wheels... it's driving me crazy!

[vladc77]

I did not kerb the wheels. I don't have any damage. Is any product exist that will help to seal the tire on wheel? Something that I can put in through air gage without removing the tire.

[britcon]

Sometimes the wheel lips will get a little corrosion which allows air escape. Try taking off 1 tire and cleaning the wheels really good - see if it corrects the problem

[vladc77]

Thank you. I will try that.

[motordavid]

While I have never had tires that did not lose some psi over time, the OP's loss is too quick. If not a crummy bead seating on the rims,
I would suspect valve stems.
GL, mD

[vladc77]

I recently changed the tires and valve too. Thank you for your input.