BC

That is a good point. Or a pump for a space saver that doesn't work. Corvette doesn't even have a spare (runflats, but people always switch to normal). When you go to 35s or larger on a truck, no spare unless you bolt it to the outside as I can see from looking at it. I always take these out of the 928s (unless I needed "correct" for some purpose) as I won't probably use it anyway.

mit Wasser

Bingo!

GT6ixer

It's an acceptable risk. For me I like driving along with ALL the stuff that came with the car. Not necessarily because I think I'll need it, but just because I like knowing I'm driving it the way if would be configured the day after it left the lot in 1984. That's a fun part of the hobby to me. Not having a manual sunroof opener tool is really bugging me these days.

Wisconsin Joe

Holding air is only part of it.

The bigger question is 'will the tread stay intact once you start rolling on it and flexing it?'

A while back, someone used their spare. It inflated and held air, but once he started rolling down the road, the tread disintegrated.

I have mine in the back, along with a compressor that works. I wouldn't want to trust it, but it's a 'better than nothing in the middle of nowhere' sort of thing. And no, I don't subscribe to the 'impact absorber' thought.

Also, to get it back in the back, removing the valve stem and putting a ratchet strap around it will get the air out nicely.

chart928s4

My original spare has been in the car or garage, i.e. stored dry and in the dark, for probably 99.9% of its life. It looks brand new. But rubber ages even when stored properly, so NOS is subject to the same issues as the original spare. Sure it's worth trying when stranded, but as @Wisconsin Joe says that doesn't mean it's going to work.

I have that spare, AAA, a repair kit, and some Slime. Two sets of belts and extra suspenders.

Just remembered I have to test that Porsche compressor!

drooman

Nice project.. Ive often wondered how to handle those tires, if they would come off and go back on in one piece. I've got a number of them to restore here and now i know what type of machine to look for. The original paint seems to be kind of a satin silver much like some of the original phone dial paint I've seen. Good score on the NOS tire...i'm a little jealous of that part!