bigs

Thanks Hilton!

I really should have thought of this. I've owned past Audi's of approximately the same vintage - and they had their batteries underneath the back seat.

They also had a very similar battery-charging arrangement in the engine compartment.

Dumb on my part!!

WallyP

Chaad,

That spare scares me. In a serious crash, that is a deadly weapon.

Tampa 928s

Doesn't everyone carry tools, spare relays, fuse print outs and jumper spade wires in there?

Leslie 928 S2

Wally, just curious....you really don't think having it hooked to the cargo net hold downs like that is safe enough? I thought that looked pretty secure.

928Myles

I had to use the spare in my 1st trip in the car. I always carry it since it can be a long way between towns with suitable garages & cell coverage can be pretty scarce too. I have heard the theory that the spare forms part of the safety calculations in serious impacts so this is another reason for keeping it in the car. One of the 'local' driving schools won't let you track the car without the spare for this reason.
YMMV

Mike Frye

Same here. I don't have a compressor in the car either. I have a tire plug kit in the car in case one gets punctured. Either way I'd have to either flat bed it or leave it there and take the flat/spare to a gas station to fill it up and then return.

I do keep the spare in the car for one other reason though. I read in Projekt 928 that the spare tire is actually part of the crash worthiness design. With all the cases of people getting rear-ended, I figure it's in my best interest to keep it there.

F451

I'm a spare tire believer. Mine got me home from work a while ago. Better then sitting around waiting to AAA to show and hope the guy operating the rig knows what he's doing.

19 year old spare, 19 old compressor, worked like a charm.

https://rennlist.com/forums/928-foru...-holy-cow.html

Ed

atb

Murphy's Law if for no other reason. If I have it, I won't need it. I'd have to pull a Nicole though, if the front tire goes flat, I'd have to put the spare on the back and move the rear tire to the front. Anyone have a GTS spare for sale?

Nicole

We had a discussion about this before, when Chaad first showed it here.

The forces in a serious impact are so high, there is no way the materials used here can hold that tire in place. Like Wally, I would not want this thing to hit me over my head... and possibly taking my head with it.

Here is a simple scenario - most accidents are much more violent than this:

If you hit a wall at 30mph, your car will be slowed down (by the crumple zone) at an average deceleration of 20-30g over the course of a few milliseconds.

Meanwhile, you and the spare will continue to go 30 mph, until you are held back by your seat belt, and the tire by its strap and cover.

At 20-30g, that would mean you put 20-30 times your weight on the belts, while the spare will pull on the materials at 20-30 times its weight.

Now picture 20-30 such tires hanging down from a 1" leather strap and a cute little brass hook.

I think you will know the answer...

Hilton

Chaad,

Enough people have pointed out the risk - how about a solution?

Behind each rear seat back, in the floor of the hatch under the carpet is a UNC-threaded hole (yes.. a non-metric threading.. on a 928!)

That UNC threaded hole is actually in the frame of the chassis and is there to mount child safety seats to using a seat-belt style tether and a metal clip. Given the child seats its designed to hold are rated to 18kg's worth of child, plus the seat, it's solid enough to hold the tire in place in a collision.

Buy a suitably rated webbing tie-down strap, track down one of the high-tensile steel bolts and retaining loop for the threading, and firmly attach the spare. The hole on that side is under where the spare lies with your current setup, so the straps will be hidden from view.

I'll go dig up a picture - I probably have one from when I had a last had a child seat in the back of my 928.

Hilton.

Nicole

Thanks, Hilton!

I have often written about safety concerns, and what I learned from reading about safety over the years.

It's important to understand that I don't do this to upset or annoy anyone, but to make sure that this person will be able to go home to his family after something went wrong. (Chaad: I'm thinking of your cute little daughter right now).

I hope we won't hear about any major injuries or death of a 928 driver or passenger in a long time. There are enough other opportunities to get killed...

Leslie 928 S2

I see your point, Nicole. Thanks.

WallyP

Nicole has answered the question for me, but yes, I think that having the spare, or amps, or subwoofers, or cargo, either floating around or marginally restrained in the hatch area is VERY dangerous.

ew928

Think it was the British TV show Fifth Gear many years back that did a collision test at around 30ish mph into immoveable barrier.
The had a tool box in the back of the car and all those nice sharp screwdrivers and other heavy metal bits went flying out of the box into the front of the car.
Ouch.

SharkSkin

I keep the spare in the car as a backup in case I can't reach AAA or they will take too long and I need to move the car to a safe place. I need to find a way to secure it though, it rattles a bit.