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Spare Tire question.
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Author:  tennja [ Thu Jun 30, 2011 10:06 am ]
Post subject:  Spare Tire question.
I finally got my boat out of storage for the season. It has beeen a busy spring. Anyway the spare tire was completely flat. :evil: (11 psi). I would have expected some drop like the 10 psi I had in the main tires.

I cant figure out why it was so low. I have never had it on the road. It was sitting up on the tire holder over the winter. Last summer when I checked it it never had much of a drop in pressure. (No more than I would expect 2 psi over the season.)

Any thing come to mind? Bead not set right? Valve? But why all of the sudden? Or should I not worry about it and replace it replace it outright? I did fill it to the appropriate pressure will check later today to see if it holds.
Author:  aguyindallas [ Thu Jun 30, 2011 12:16 pm ]
Post subject:  Re: Spare Tire question.
Maybe either the tire has developed a leak to to dry rot, or perhaps the valve stem. Air it up, see if it holds and go from there.
Author:  EvilZ [ Thu Jun 30, 2011 3:31 pm ]
Post subject:  Re: Spare Tire question.
Yup - use some soapy water to see if/where you have a leak, or take it down to a tire store and have them do it...
Author:  ric [ Thu Jun 30, 2011 3:34 pm ]
Post subject:  Re: Spare Tire question.
Never worry about valve stems again
http://www.summitracing.com/parts/BSP-999900

PS, Tires leak air by nature due to molecule sizes of rubber, oxygen, nitrogen, etc. If you just use gas station/compressor air... expect 1-2 psi a month on average until all the oxygen has leaked out. If you use nitrogen, 1-2psi every 6 months. The claims about how nitrogen makes you get better gas mileage is based on the fact that people never check their tire pressure. Really, just the stuff doesn't leak out rubber as fast as the 20% oxygen in our air.

If I trailered a lot and had a spare, i'd have just the spare filled with nitrogen. Filled to 35psi in the spring, it should be 30 or so by winter.
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