Ranfurly

Hi All

I have searched this and found a few threads but nothing recent and definitive for my questions.
I have just acquired (assuming they turn up) a set of CS wheels 8” front 9” rear all with 60 offset. It looks like they were orinally fitted with 17mm spacers on cars.

From my reading there are better spacers to use with the correct stud fitted - comments made about hub and wheel bearing changes...

so, do I need the 17mm spacers to fit the rear wheels? - MY1991 S4
Does anyone know of suitable spacers that are available e.g. bolt on no changes required to hubs studs etc.

searching online Sunset have 17mm spacers advertised for 997’s are they okay to use?

Thank you in advance to any help provided.

Richard

FredR

Richard,

You can fit the rear wheel without a spacer - it will sit about 7mm inboard of the stock S4 location.

With a17mm spacer it will look better as it will fill the wheel well better. Handling wise I doubt you would notice any real world difference - theoretically speaking mounting further outboard is preferable.

The problem with these wheels is the very limited availability of the 245x45 rear tyres- how well NZ is supplied with such [or not] I have no idea. The "big" advantage of these wheels is that you can also run them on the front wheels. Such may not be to everybody's taste but for sure it is what I would do if I still had my late 90 S4 and a set of such wheels. Toyo and Pirelli offer tyres in the 245x45x16 size.but they may well have to be a "special order" in your locale.

Mrmerlin

What I would do is get your wheel tire package done .

Note you’re not gonna put any spacers on the front.

I would mount the wheels with no spacers ,
and then measure the outside edge of the tire to the inside edge of the outer fender,
use the number that’s lower from either side.
subtract 5 mm and that will be your target spacer,
I would suggest use bolt on bolt on spacers

EG Left =36MM ..Right 34MM So lowest number minus 5MM = 29 MM this is your target spacer, OK to go under but not over.

Note you may have to get 10 open ended Lugnuts for this to work if the studs are longer and you’re using bolt on bolt on spacers.


As always posting pictures of the inside of your wheel mounting surface and the studs what you’re doing would be beneficial

puyi

Don't know about 17 m spacers from 997. What I know, is 17 mm spacers come with double stud ad then no need of changing anything on original stud mount. Just buy the original double stud 17 mm spacers @ your local porche dealer and it will be nice.

The 9" cs design wheel will mount without spacers but it will be ugly a little bit.

So get that double stud spacers and it ill will be OK

928cs

https://rennlist.com/forums/928-foru...r-spacers.html


Are your rims with or without RDK? In both cases, they are very precious rims.

Michael Benno

I have a set of 17mm spacers, longer lug studs, and open ended nuts available Replacing the studs will require aa wheel bearing change though. if you want to go thus route let me know.

Ranfurly

Hi

Thank you for the responses. In brief:
I should receive the wheels next week so I'll be able to swap the tyres (in good condition correct fitment) from my manhole wheels over to the CS rims and test mount them - follow Stan's advice.
I believe the wheels have RDK sensors in them.
Reading other threads the part number quoted as being the correct orginal bolt on 17mm spacer is - 951 331 611 02.
Searching that part online shows that it is widely available, but that it is a slip on type spacer (as shown in product pictures on a number of sites) vs comments in other threads that it was a bolt on spacer


as per H and R spacers.

At the moment I'm thinking that a 17mm bolt on spacer quoted for a 997 911 should be okay to use as they're hub centric, PCD and bore are the same, assuming the bolts are long enough to be safe.
That product is available via parts suppliers. H and R don't apepar to make a bolt on spacer smaller than 21mm which from various comments in other threads may be too big for my car - rubbing, needing fender roll which I don't want to do.

Mrmerlin

Based on this response you didnt understand post 3.
I suggest that you reread it as the 17MM spacers might NOT be the best choice

NOTE there should be black plastic shaped diamonds that surround the PDK sensors on the inner barrel of the rims,
they get brittle and crack off,
it looks like a few are missing I would replace all of them.

Ranfurly

Hi Mrmerlin

Got it! Thank you.

Richard

928Myles

Richard,
it would be wise to check with your local WOF officer as to which type of spacers will pass inspection. My recollection is that it can be difficult / impossible with some types to get a WOF.

Myles

worf928

The OE spacers are bolt on. When you buy used, you get ready-to-use. When you buy new, you need to buy all the pieces to “build” them.

You need:

2 x 951 331 611 02 (“blank” spacers)
10 x 993 331 671 02 (wheel studs)
10 x 999 182 003 36 (lug nuts)

Heat spacer, press-in studs, bolt assembly to rear hub, bolt wheels to spacer.

I do not make this $h1+ up.

I have three GTs in the shop right now with these 17mm spacers and CS wheels. One with the spacers constructed with all new parts.

Red Flash

Hmm... No less than 3 GTs in the shop with CS wheels!

Dave obviously qualifies as the 928 GT specialist out there!!!

khalloudy

Has anyone been able to keep the RDK functioning while installing the spacer on 90-91?

Rob Edwards

It would be a matter of installing a spacer of the same thickness as the wheel spacer under the two bolts that hold the RDK sensor bracket to the rear of the hub. I'm assuming (?) this was done on ROW market '89 GTs with RDK but then again I'm not sure how that would work, since the bracket mounts on the inboard side of the rear hub carrier, and the rotor dust shield is on the outside. Maybe 17 mm off center wasn't enough for the sensor to lose the signal? Dunno.

For the GTS with 17" wheels there are GTS-specific RDK sensor brackets that stick 1/2" further out to maintain the gap to the sensor.

worf928

One GT I have here has CS wheels with RDK and the spacers. Works out of the box.

Maybe not for non-CS wheels?