CloseQuote:
ADias said:
MMD: Is that a 996 or a 997 user's manual?
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MMD said:Quote:
ADias said:
MMD: Is that a 996 or a 997 user's manual?
Yes, it is a 996 manual. No problem though because the _collapsible_ spare for the Carrera 4 and 4S (the only one which will fit in a 997's trunk) has a 996 part number and is _approved_ for use by Porsche and PCA for use on 997s.
Actually the Carrera and Targa spare WILL fit in a _997/S_ but it's got near zero clearance and must be radically slanted. Not sure if it fits Turbo 997 or 997C4.
Neither spare fit over Turbo PCCBs. I've _heard_ collapsible will fit normal 997s with PCCBs; other "doughnut" spare will not fit over any PCCBs.
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ADias said:
I thought so. So... you are saying that a 996 C4 collapsible (the one I have currently) will fit the 997S even w/ PCCBs.
I'm still wondering if it will not put a strain on the differential due to having a smaller circumference.
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ADias said:
Ok. Good research work. I'll check w/ my PCA buddies just to make sure.
The circumference delta between the 996 wheels and the 997 wheels is not trivial. There will be assymetrical loads on the diff, but it may be OK for short stints.
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MMD said:
My guess is the "no-faster-than-50mph" requirement for using the spare should be given the same respect as The Laws of Physics.
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ADias said:Quote:
MMD said:
My guess is the "no-faster-than-50mph" requirement for using the spare should be given the same respect as The Laws of Physics.
MMD: the 50MPH was already a limit when it was used on a 996 with matched circumferences. That limit has to do with smaller tire patch and the weaker structure of the spare tire. On top of that there is a pronounced asymmetry due to circ. diff on a 997.
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1st997 said:
I owe a LOT that I have learned on this spare tire subject to MMD. And thus a THANK YOU (again) is given.
His grasp of accurate knowledge, comments, and photos / documentation is INCREDIBLE.
A few years ago when I just got my brand new ___spareless___ M3 and two days later I had a friggin' flat.
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1st997 said:
I owe a LOT that I have learned on this spare tire subject to MMD. And thus a THANK YOU (again) is given.
His grasp of accurate knowledge, comments, and photos / documentation is INCREDIBLE.
Agreed. MMD is always at the forefront with meaningful contributions.
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Circe said:Quote:
1st997 said:
I owe a LOT that I have learned on this spare tire subject to MMD. And thus a THANK YOU (again) is given.
His grasp of accurate knowledge, comments, and photos / documentation is INCREDIBLE.
Sep 2, 2007 2:59:45 PM
-AS ALWAYS - a plugged tire should be replaced as soon as possible and can no longer be used at high speeds.
Sep 2, 2007 3:06:30 PM
Sep 2, 2007 5:05:22 PM
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Leawood911 said:...Keep in mind that regardless of the type of spare you have you should always only mount them on the FRONT. If you have a flat in the rear you need to move the front tire to the rear and put the spare on the front. Don't put the spare on the REAR, ever. This is well documented....
Sep 3, 2007 2:54:09 PM
.
Sep 3, 2007 3:24:59 PM
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Leawood911 said:
If I have a flat on the rear and have my choice of waiting for (four+) days for a new tire and be stranded or move a couple of wheels and be back on the road I will not waste any time changing tires. I bet I can do the whole change (front to rear and spare on front) in less than 10 minutes without breaking a sweat. Not having a spare is totally out of the question for me. For long road trips I take all kinds od spares and extra tools with me - headlight bulbs, fuses, spare quarts of oil and coolant (specific types can be hard to find on the road), laptop with Durametric software (allows the co-pilot to monitor all types of engine parameters in real time). I also pack a first aid kit!
Sep 3, 2007 5:44:02 PM
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Leawood911 said:
It is not a circumference issue at all. It's a width issue. Replacing a 295 rear (11 inch wide wheel) with such a skinny spare wheel makes the rear really, really nervous at any speed. I know, as I did not know to put the spare on the front the first time I had a flat on the rear in my 996. When I ran accross the recommendation to move the spare to the front I totally saw the light.
I routinely get in my car and cover 1500+ miles in 20 hour blasts by myself just for grins. If I have a flat on the rear and have my choice of waiting for (four+) days for a new tire and be stranded or move a couple of wheels and be back on the road I will not waste any time changing tires. I bet I can do the whole change (front to rear and spare on front) in less than 10 minutes without breaking a sweat. Not having a spare is totally out of the question for me. For long road trips I take all kinds od spares and extra tools with me - headlight bulbs, fuses, spare quarts of oil and coolant (specific types can be hard to find on the road), laptop with Durametric software (allows the co-pilot to monitor all types of engine parameters in real time). I also pack a first aid kit!
If you are really lazy I bet you could call Porsche roadside assistence to come and change the tires for you!
The only benefits I can see by not having a spare are $ savings and weight savings for Porsche. Maybe you don't drive many miles and hence do not get many flats. I drive around 20K miles per year and all the new monster homes being built around my neighborhood cause many nails on the streets
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