I believe it is, although I guess technically I cannot say for sure. To check it you could certainly inflate it and then deflate. Probably a good maintenance item that does not get done much. Maybe once every year or two???

You'll love the Fuzions. I've run them for at least 30k and they don't even look worn. Great tires.

This spare tire provided one of my most embarassing (stupid) moments in my 51 years on this Earth....funny as hell looking back on it, especially being an engineer.

The 2nd day after purchase of my Carrera, I strip everything out from under the bonnet. I'm all into this, just me and the mother machine,..like a kid in a candy store,..completely elated,..outright high,..not tolerant of any distractions,....I have the spare out, grab the compressor,..promptly drop it, cracking the plastic housing,,,still being functional but less stationary. I proceed to inflate the tire,...get it up to pressure to then let it sit while doing other things at the engine...about an hour later I check it and she's holding pressure quite well....back to the engine,..then stuff on the interior,..then I get ready to button everything up under the bonnet..the wife comes out asking if that's a compressor she sees. I tell her yes and what it's for, what I'm doing, etc. She's walking around the car, as I grab the spare to mount it back to it's home. I'm having much trouble getting the spare in place,..becoming a bit aggravated...the wife hear's me say (loudly)"Now I know I got the damned thing out FROM there,..WTF's up here?" , tossing the spare to the ground. She THEN says, "Honey, do you have to let the air back out or something like that?" You shoulda' seen the "lumens" from the quickly igniting thought bulb. I felt like a frikin' idiot,..amazingly perfect fit when deflated. I wasn't even drinking that day. I remember this everytime I work on the car...

....idiot.

Best,

I too, have questioned what the other stem is for on the spare. I know that someone mentioned earlier that they "thought" is was for a quick deflation. Is there any real information that actually states what the other stem is for? I ask, because, I have also read that it is actually a safety valve, so the tire does not get over-inflated, not a means to deflate?? Anybody with the real story on this?? I have seen other items with a similar stem, that was an over-pressure safety valve.

I just happened to have these sitting on my desk. Thought some may be interested. My first thought is that this was simply a pressure relief valve preventing dangerously high pressure. But I think Wil may have it.

http://forums.pelicanparts.com/uploa...1206128120.jpg
http://forums.pelicanparts.com/uploa...1206128147.jpg

The hole on the left is the relief side. It is much bigger than the inlet on the right (where i just barely caught the edge of the hole).

http://forums.pelicanparts.com/uploa...1206128160.jpg

Another good tip if you have an LSD (which I learned elsewhere here):
If one of your rear tires gets a flat, replace it with one of your front wheels, then put the spare on the front. This will keep the rear wheels spinning at nearly the same rate, and save your diff from excess wear.

That should be done regardless of LSD or not. Never run the spare - on any car - on the drive wheels.

Also, if you don't have the factory compressor, since they are NLA and go for big bucks on E-bay, etc, get a cheaper alternative one. I have a nice craftsman one that I kept in the front of my 86 for a number of years. My turbo has the original copmpressor, although it has the new and improved closing option for the case, duct tape.

Bill

Shane,
I thought recall seeing a large canister, maybe c02, that Porsche included as a tire inflator.
I think there maybe one in my front trunk. I wonder if its still good? On the other hand a common 12v pump sounds like it would be more useful (basketballs, kids toys, saving the stranded motorist).

So, they carry 130mm wheels with mounted tires with them everywhere they go? I'll spare the chances and keep my spare with me. :D

THAT'S not a blow out, THIS is a blow out. Ha!

My tire plug kit and foot pump wouldn't fix this. :D

Someone was looking after you the day of your flat. To have just purchased a pump and have the flat at slower speeds is one hell of a coincidence. The carnage seen below happened at 80mph ...


http://forums.pelicanparts.com/uploa...1206206231.jpg

ouch...

you are right, Rarly, I was fortunate and blessed. there, now have covered it in case any of the OT guys come over here...;)

Funny thing, I had an ES100 Yokohoma blow out too. It only had 500 miles on it. What gives?