[rhudeboye]

I have the stock suspension (no M030) on my 94 968. I've planed on going to the twists before I even got the car, its just the way I imagined my 68!



This deal on ebay looks pretty good but I was wondering if I was going to run into any issues going up to an 18" wheel and will it fit properly?



http://cgi.ebay.com/ebaymotors/PORSCHE-WHE...1QQcmdZViewItem

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[rustech]

Incomplete link.

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[Bob Kovacs]

[quote name='rhudeboye' date='Jul 25 2006, 12:41 AM']I have the stock suspension (no M030) on my 94 968. I've planed on going to the twists before I even got the car, its just the way I imagined my 68!



This deal on ebay looks pretty good but I was wondering if I was going to run into any issues going up to an 18" wheel and will it fit properly?



http://cgi.ebay.com/ebaymotors/PORSCHE-WHE...1QQcmdZViewItem

[right][post="24544"]<{POST_SNAPBACK}>[/post][/right][/quote]Just so you know, Porsche did not recommend using 18-inch wheels on the 968 without suspension upgrades. I was as surprised to learn this as most of you are. I read this in a recent issue of Panorama and posted about it on 968.net. In the early 1990s, Porsche issued a factory technical bulletin that stated 18-inch wheels were not recommended on ANY Porsche model without upgrades. In some cases the upgrades were minimal but they were more comprehensive in others.



In the real world, this will only be a problem if you push your car hard. If you keep increasing the size of the wheels and improving grip, something else will become the weak link in the chain and that will break. Porsche was apparently trying to avoid an increased number of warranty repairs on cars' suspensions due to the added grip and loading of larger wheels/tires.



Don't shoot me... I'm just the messenger. Clearly, lots of people run 18-inch (and larger) wheels without problems. Just thought you might like to know what Porsche's position is on this.



--Bob

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[rhudeboye]

Thanx, I REALLY Appreciate it Bob. What the manufacture recommends is always high on my list.



New link.



http://cgi.ebay.com/ebaymotors/ws/eBayISAP...TRK%3AMEWA%3AIT

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[sasilverbullet]

And along those same lines keep in mind that a 17" tire today is NOT the same 17" tire that was available in 1993.



Better tires alone could increase the grip enough to where there is another 'weak' link even for us with 17" tires.



Note: I lived in Germany for nine years and their opinion of mods to a car, especially the wheels, without the blessing of the factory is verboten! In fact, you can't LEGALLY upgrade your tires/wheels without the approval of the TUV (german car inspectors). And they will not certifiy any tire/wheel combo that the manufacturer hasn't said is okay...

and they think that we here in America have the same opinion...he, he.



Changing your tire/wheel sizes to whatever combo we want is almost as American as apple pie! But that doesn't mean that we can't come up with a combination that isn't safe...



And for the record I don't believe EVERYTHING that Stuttgart says regarding our cars...sometimes the business/marketing statements have nothing to do with what the engineers think!



Some things to ponder...

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[rhudeboye]

[quote name='sasilverbullet' date='Jul 25 2006, 11:26 AM']And for the record I don't believe EVERYTHING that Stuttgart says regarding our cars...sometimes the business/marketing statements have nothing to do with what the engineers think!



Some things to ponder...

[right][post="24562"]<{POST_SNAPBACK}>[/post][/right][/quote]



So do you still have stock wheels and if not what size are you running?

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[sasilverbullet]

I have what came on the car when I bought it - 17". I don't know if they're from the factory or not.

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[rustech]

[quote name='rhudeboye' date='Jul 24 2006, 09:41 PM']I have the stock suspension (no M030) on my 94 968. I've planed on going to the twists before I even got the car, its just the way I imagined my 68!



This deal on ebay looks pretty good but I was wondering if I was going to run into any issues going up to an 18" wheel and will it fit properly?[/quote]



You might need a thin 5-7mm spacer on the front to help the wheel clear the hub (and hub dust cover). I've known a few people to have trouble getting it to fit without it with that 7.5" rim. I have the 8" rim up front and have no problems. The widest tire you will get on there with the spacer is a 225 which is fine for your 7.5" rim, just don't expect to get much more meat on them.



The rear offset is fine. A couple people have had the parking brake cable rub the inside of the rim with that offset but most have no problem. IMO, 65 offset is too far in cosmetically, and so I would add a 10mm spacer and slap on 265-275 tires. You could go 285, but then the differential front to rear would be too large.



I don't think any Porsche wheels are perfect without a little help (other than stock). Aftermarket you could get anything you want.



Hope this helps.

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