Losing Tire Pressure

[BrianTheK]

Just bought a couple Rad City STs a few months ago. I try to keep the air pressure at 55#, but I've noticed that over the course of a week, all tires will lose anywhere from about 5-15# of pressure, which seems odd. Anyone else have this issue? Should I get a Schrader valve wrench and see if the valve itself is a little loose? Pump some SlimeTM into the tubes? Any ideas on where my air is going? Thanks in advance.

 

[PDXzap]

You can just spit on your finger and rub it over the valve or put a little soapy water on it... if it bubbles you need to tighten it or maybe replace it.
I have an older Currie that has thicker, thorn resistant tubes will hold most of it's air for over a year. I also have a newer Como that can lose 30 pounds in front and back in a week... go figure.

 

[AHicks]

Oh Boy, been here.....
Short story is added Slime to the tubes and ended the problem. Now go months between fills.

Long story is I tried several different tubes, standard and supposed "heavy duty". Cheap tubes and supposedly the best you can buy, and they ALL leaked air at about the same rate - weekly fills required.
I even asked dealers (2) about adding something like Slime, and they both said it was a bad plan.

Lesson learned: It's a bad plan because it reduces their chances of making money off me.......

Add the Slime. If you are still loosing pressure over a week's time, add some more. You didn't get enough in the first time.....

 

[Sierratim]

Just bought a couple Rad City STs a few months ago. I try to keep the air pressure at 55#, but I've noticed that over the course of a week, all tires will lose anywhere from about 5-15# of pressure, which seems odd. Anyone else have this issue? Should I get a Schrader valve wrench and see if the valve itself is a little loose? Pump some SlimeTM into the tubes? Any ideas on where my air is going? Thanks in advance.

All tubes leak air through the tube walls. A couple of lbs, maybe up to 5#, is what I see. 15# of loss in a week is excessive so you may have a valve issue as well. Without a tire sealant, you should plan on a weekly tire pump-up.

 

[Kyogiro]

I put a little pressure in my tires every month. A few PSI, something like 5 at the most but I'm running tubeless but I wouldn't check the pressure of any given tires more than once every two weeks except if I'm a heavy rider (more than 300 miles/week, in than case, I would check the pressure weekly).

 

[Chopperbill]

I use Stans sealant, tires never lose air.