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[scottwstevenson]

the tire losing a few psi per week.
valve stems dry rot in florida, you can't really see it until it's extreme and fails hard but it's a very real thing.
you can also check that the schrader valve is snug in there too before  you replace the stem.

aaron

THANKS, Aaron.  Replacing the tire did nothing to help the situation, so I'll check into this!

-Scott

[Specter]

a new tire should have come with a new valve stem already.
another issue especially with aluminum rims is corrosion.  they get that white chalky crap or slight rust on them if steel, then won't seal properly.
sometimes a good polishing or burnishing can fix this.

worse case, a bottle of that ride on gloop poured in will circulate and seal the tire as well.  it also works nicely for self balancing too in some conditions.

aaron

[scottwstevenson]

a new tire should have come with a new valve stem already.
another issue especially with aluminum rims is corrosion.  they get that white chalky crap or slight rust on them if steel, then won't seal properly.
sometimes a good polishing or burnishing can fix this.

worse case, a bottle of that ride on gloop poured in will circulate and seal the tire as well.  it also works nicely for self balancing too in some conditions.

aaron

Thanks for this!  I don't recall putting in a new valve stem. I had bought just the tire a while back and didn't bother putting it on b/c I wasn't troubled with the slow leak issue, its possible the new valve stem got lost in the move.   (I didn't mind checking the tire pressure regularly, as it was kind of a good reminder to check all systems before lifting off.)   

I do have some flat out that I could toss in there. (Used it on the 12,000W "E-bike" I sold recently for a flat and it worked great!)  Probably not a bad idea as I wouldn't say I'm a pro a replacing and balancing tires...

On a previous bike I started to see the tire pressure drop with newish tires. I had the wheels powdercoated and put new tires and valves on. They were good after that. Surprisingly the powdercoating was cheaper than the tires. My current Zero R is starting to show similar symptoms. Once the tires wear a bit more I'll do the same to it.

Also sprach (wiederholte) Zarathustra.    Danke dafür!  So eine einfache Lösung!   (Wenn's funktioniert werde ich höchstwahrscheinlich dementsprechend den Preis ein bissl was erhöhen...)

-S

[Specter]

some of the cheaper valve stems,  like those cheap shit chinese wheels you can get for trailers... ive had them dry rot in as little as a year or so.  i had to take the tire to my friend at the auto shop to get a new stem for it and asked... a year??? really??? and was told, yes that is common for a lot of the cheap crap.  and even newer ones can start leaking in a few years.   especially if you are checking pressures a lot, like at the race track, you are bending them a lot with the  on / off of the inflator nozzle / psi gauge.. which causes them to crack faster and seep air

pump tire up  get cup of water throw a good table spoon of dawn dish soap in it, stir to mix and gently spray on tires / rims /wo frothing it up.  if you have leaks, you'll see tiny bubbles  ....  the bigger the bubble.. the bigger the trouble.

aaron

[scottwstevenson]

some of the cheaper valve stems,  like those cheap shit chinese wheels you can get for trailers... ive had them dry rot in as little as a year or so.  i had to take the tire to my friend at the auto shop to get a new stem for it and asked... a year??? really??? and was told, yes that is common for a lot of the cheap crap.  and even newer ones can start leaking in a few years.   especially if you are checking pressures a lot, like at the race track, you are bending them a lot with the  on / off of the inflator nozzle / psi gauge.. which causes them to crack faster and seep air

pump tire up  get cup of water throw a good table spoon of dawn dish soap in it, stir to mix and gently spray on tires / rims /wo frothing it up.  if you have leaks, you'll see tiny bubbles  ....  the bigger the bubble.. the bigger the trouble.

aaron

This would make sense given that this was the wheel (and valve stem) that I had to ride home with a flat on.  (Simply wasn't the neighborhood / place to have a breakdown if at all possible, and I didn't want to get a tow just to go the extra mile or so once in the clear.)

I'm looking into getting a new valve stem... (Luckily, I'm getting some hits on my ads elsewhere, from folks who would just buy as it, so I've not just gone ahead and attempted the fix.)

THANK YOU, Aaron!

-S