Flat tire without a leak question

[trilinearmipmap]

OK I know about zero about cars except for the very basics.

Yesterday my wife's Pilot got a flat tire. Well almost flat, there was about 10 psi left in it.

We put on the spare tire and drove it to the mechanic's place (no dedicated tire store in our town) expecting to get the puncture repaired.

The mechanic told us he could find no leak in the tire, and the air must have leaked out between the rim and the tire.

I've never heard of this before and I don't know WTH is going on. In any case I will be checking the tire pressures closely for the next while.

If anyone knows anything about this please let me know. I have never heard of air leaking out without a puncture. And if air can leak out between the rim and the tire then it can do it again.

[spf1971]

Tires will naturally loose pressure over time. You just need to keep an eye on the pressure.

[Whitedart]

OK I know about zero about cars except for the very basics.

Yesterday my wife's Pilot got a flat tire. Well almost flat, there was about 10 psi left in it.

We put on the spare tire and drove it to the mechanic's place (no dedicated tire store in our town) expecting to get the puncture repaired.

The mechanic told us he could find no leak in the tire, and the air must have leaked out between the rim and the tire.

I've never heard of this before and I don't know WTH is going on. In any case I will be checking the tire pressures closely for the next while.

If anyone knows anything about this please let me know. I have never heard of air leaking out without a puncture. And if air can leak out between the rim and the tire then it can do it again.

Curb rash will do it, alloy wheels will leak with age and corrosion, valve stems can leak (more so if caps are missing). There are other reasons, but these are the main ones.

But yes, air can leak between the tire bead and the rim.

[trilinearmipmap]

Thanks for the advice. I guess I need to check my tire pressures regularly.

[petaling108]

Thanks for the advice. I guess I need to check my tire pressures regularly.

ask mechanic to put sealant on rim after removing excessive rust/corrosion.

[Pete_Coach]

ask mechanic to put sealant on rim after removing excessive rust/corrosion.
I do not recommend putting any type of sealant on the wheel. The rubber needs to adhere to metal to make a good seal.
Aluminum rims are bad for not holding the bead . You could have hit the curb or driven into it in a parking lot. When the mechanic took the tire off and remounted it, he used the soapy soolution to moisten the bead agan and it should hold.
Also, checking tire pressures regularly is a must not only for fuel efficiency reasons but for safety reasons as well.