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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,244
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valve stem expertise please
Can anyone tell me what this valve stem is and why it is used on the space saver spare?
I'm looking to mount this tire on a conventional rim (Fuchs) and wondering if I can get away with a regular stem. Thanks Bill K 
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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02-28-2007, 03:05 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,244
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maybe its just a fancy all-metal one that does not deteriorate after years buried deep within the trunk?
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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02-28-2007, 10:54 AM
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Administrator
Join Date: Feb 2000
Location: Los Angeles
Posts: 13,334
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And is less likely to get damaged by a lateral impact from something being put into the trunk.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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02-28-2007, 12:04 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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There are many types of metal valve stems available. Those appear to be HD truck stems ... a friend of mine who is a serious hunter puts them on every wheel of his new 4WD trucks to protect from limbs and brush damage to the stems!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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02-28-2007, 12:12 PM
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Join Date: Feb 2000
Location: Los Angeles
Posts: 13,334
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Racers use reinforcements on the stems because at sustained high speeds, centrifugal forces can cause the stems to bend, crack and/or shear.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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02-28-2007, 01:33 PM
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iv seen guys weld a piece of pipe around the stem to protect it. Anyway this reminds me that i was wondering about my spacesaver stem also. It has a small white spring loaded thing nexto and built into the stem. I was thinking it might be so you know how full to make the tire. Like it pops out when its full? but i havnt tested it. anybody know
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82 SC , 72 914 |
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02-28-2007, 02:08 PM
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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,848
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No, it's to deflate the tire when you are ready to put it away. Not everone has a valve stem removal tool handy or the time to let the air out with a wooden match.
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02-28-2007, 02:53 PM
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Registered
Join Date: Dec 2006
Posts: 78
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Quote:
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Big Jake Porsche 996 I've been known to take apart a 996 or two. |
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02-28-2007, 03:01 PM
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Quote:
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82 SC , 72 914 |
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02-28-2007, 03:21 PM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,244
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I just read the fine print on the sticker and it says the tire is not to be dismounted and re-mounted.
I've seen a couple pass thru the FS board, so I think this is possible. Will my tire guy be able to do this with his state-of-the-art equipment? thanks again Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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02-28-2007, 03:37 PM
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from what i gather its very possible but its a pita
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82 SC , 72 914 |
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02-28-2007, 03:42 PM
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Porsche
1972 porsche 914
