Sailmed

Hey - Toss it out, wait the hour on the interstate for the wrecker - and wait up on the side of the road, not in the car that gets rear ended - oh yeah - toss out your fire extinguisher too - we will be there before the whole car burns - maybe even save your spare tire!
SITM 2008 we needed TWO to get a fellow traveller back to the compound. We used the 20 year old one from their car and the one out of my '78. That one has been put in service 3 times this year.
Try your fix a flat on THIS

Leon Speed

They still make the tire which was used as of '92 (second one from the top): http://www.vredestein.nl/Banden_Band...&BandtypeID=25

I guess it could be fitted to a 16 inch rim to be used in earlier models as well.

Jerry Feather

My two cents is that I wore one of my rear tires down to the air because I had them overinflated (around 40 psi, as I recall) while I was on a short road trip. On the way back, about 65 miles away from home, the right rear blew out, or simple gave out since there was nothing there in the middle of where the tread had been. I was lucky to be very close to an exit from the interstate, so I drove with the flat tire very slowly up the exit and into a Conoco station nearby. I used the little jack in the 928 to lift it and took the original (87 S4) spare out and used the station air to fill it up then changed it. I drove the 65 or so miles home on the freeway keeping my speed to around 55 mph, but with occasional deviations up to about 65. I put new tires on the rear of my 928 and deflated the spare and put it back in the well. There are no visible signs of wear on it. I was glad to have it with me; and I have bought about 3 or 4 more spares on eBay for spare spares for this one and my other 928's.

Jerry Feather

WallyP

I have the spare and the compressor in my '90 GT, and used it last summer. I have heard way too many horror stories about damage from towing, and I don't care to wait for an hour. Fifteen minutes, and I was on my way.

jcorenman

We carry the spare and pump, and have had one occasion to use it so far. We were headed home from the SF bay area a few years ago in the S4, fully loaded including Kiwi (our cat) riding shotgun in the back. The right-rear suddenly deflated on a freeway ramp (where I-505 meets I-5), by the time we got slowed down and found a shoulder the tire was a smoking ruin-- "fix-a-flat" was not an option.

We could have called AAA but prefer to be self-sufficient when possible, so dug out the spare and tools and swapped it. We somehow got everything back in the car, got on the phone to Tire Rack and drove to Redding (about 60 miles). We were back on the road late the next morning.

The tires were almost brand-new, fitted the day before IIRC. What happened was that the RR had picked up a nail and slowly deflated to the point where the bead unseated on the curve. Tires are stiff enough these days that you don't really notice anything until things really fall apart. A TPM system would add a nice layer of insurance.

James Bailey

Note that the cans of fix-a-Flat state avoid high temperatures........ there are instances where the in car temperature has been said to have caused them to BURST ....Also states..."Do not use in ....., high performance, Z-rated ...... tires."

Maleficio

I have a full-sized spare, identical to my front mounted tires and wheels. I keep it secured to the roof with heavy duty bungee cords. I can't use my sunroof like this, but at least I'm covered in case I blow out a tire on these horrible roads in Virginia Beach and Norfolk, VA.

Dennis Wilson

+1

I still have spots of latex in my 78 euro from an exploding Fix a Flat can. Also found out that latex will cause leather seats to crack.

Not sure about the later 928's but my 78's had a warning on the spare tire cover stating that space saver spares should not be used on the rear axles.

Dennis

Rocketman928

I too thought I could repair a tire on the side of the road and have my sub in the spare tire hole.

Got a nail in the rear last year, it flew out at 80 mph, pulled over, patched the tire with my motorcycle plug repair kit and the tire inflated twice its size. It was destroyed from running flat for 30 seconds. "Happy" wife drove 1/2 hour to deliver extra rim.

I then simply carried a front wheel in the back (keeping the sub operational!) strapped in to the cargo loops but still dangerous if I get into an accident.

This season I tried to get my SS spare fixed (came off the bead). Mine is 23 years old and I pumped it up to 90 PSI to try and get the bead right - didn't work but proved to me that its quite robust.

I got a replacement from a 944 from 9-Apart in Ontario. Never used and tested it. It deflated 100% fine.

It is my sub enclosure now. I have a piece of black lexan covering that side with a 10" sub mounted to it. A 1" neoprene gasket form a seal around the rim of the SS spare and the underside of the lexan. I taped the "spokes" of the spare closed and left the center open to make a "band pass" style enclosure.
The 200 watt powered sub performs 3x better than it did in a box.

I get a spare - luggage room and a great stealthy sub!

Big Dave

I've used my spare and managed to get it back down to size to fit inside the car again. My 928 was inside the lower level of a parking garage...no tow truck could fit there!

dcrasta

That sounds like a very slick solution. Please post pics :!

Maleficio

Very cool.

StratfordShark

I've also wondered whether it's worth carrying the s/s, as I carry a can of the inflator stuff Porsche includes with all their new cars these days (afaik), as well as a compressor for the s/s.

Take the points made about a bad flat rendering the tyre useless (and points about rim damage), but I'm puzzled when people have mentioned carrying a full-size spare. How do you know whether you will need a front or rear, or can you mix the different size front and rear tyres on an axle in an emergency?

frustrated

It makes a good casing for a shallow Sub!

Hilton

This is VERY important and can't be stated clearly enough. Those carrying full-size spares NEED to secure the wheel properly. The cargo net loops are not safe.

There are UNC-threaded holes in the rear cargo area designed to take child-seat anchor bolts (required by law in some countries like Canada, Australia and more - Porsche fitted the threaded hole in the frame to all 928's I've seen, although not sure about 78/79. (bit of trivia - its the only non-metric thread on the car )

This is the bolt I'm referring to - screws into the rear hatch floor just behind either rear seat back, no modifications to the car required.

Ebay link
Non-ebay link

For $20 including the tie-down, you won't get killed by a flying wheel. Cheap safety!