hacker-pschorr

I'm not going completely insane, my 79 & 80 have no such provision to bolt down the spare tire. Is there some other provision to bolt down the spare in the early cars someone could point a photo of?

I'm sure it's possible, I just doubt it really makes any difference.
Also, in this day & age, especially in America, you're most likely to be rear-ended by a soccer mom texting while driving an 8,000lbs 7' tall SUV with a bumper that will make contact with the rear window of a 928.

Christopher Zach

Check to see if there are any brackets, hooks, or residue of where a bracket/hook might have been in the spare tire well compartment. Maybe they used hold down straps or bungees like they did on the 914.

Still, if you are getting hit in the back hard enough to crush the tire well you have bigger problems to deal with such as the transmission entering your passenger seat and covering you with hot, buttery fluid.

hacker-pschorr

I just know my 81 was purchased by my father in 91, two owner well documented car. Everything came with the car as original and the spare was never secured.
I would like to find out what kind of system was in the early cars so I can start to source them for my 78.

The drive-train of the 928 is designed to drop in the event of a collision and the battery is bolted to the battery box.
It doesn't take much of a crash to turn every day objects in the car into deadly projectiles, much less a very heavy metal wheel with a rubber band around it. This doesn't just apply to being rear-ended. A front end crash will cause everything not bolted down to suddenly come flying forward.
An other wise survivable crash you may have walked away from with bruises is now a fatality.

Shawn Stanford

I've spent a lot of time in the spare tire well of my '82. I don't recall seeing any brackets for the spare. It wedges in there pretty tight, and the cover had a retaining clip. Maybe Porsche didn't feel it was necessary.

BTW: I'm shopping for 928 spare tires - wheels, actually - so that I can put snow tires on my daughter's Boxster. So if you're deleting your spare, I'll take it.

Christopher Zach

That brings up another question: When I swapped the battery on my 86.5, I didn't see a bolt and keeper to hold down the battery in that box, the battery takes up the whole box. The only thing holding it down is the cam on the box cover and of course the spare tire with the bolt. Technically with the spare in and secured the battery could never come out, maybe they bolted down the battery on earlier models and left the spare secured by straps or something.

928cs

It seems that the bolt is listed into the PET from the 1983 MY only. Reference 900 075 041 09 (M10X25) up to 1985 MY. Reference N 040 281 1 (M10X45) from 1986 MY.