JDR944

Hello, can somebody please tell me what spacers/longer studs I need in order to fit some '99 Boxster 16" rims on my '86 951? My stock phone dials are a little scratched and faded. My dad has the rims that came with his '99 Boxster just sitting in the garage with almost new Continentals on them. The result...I want to put those rims on my car. I have neglected to do so because I have the dreaded early offset but I figure that even with the expense of the spacers the almost new wheel/tire package is more than worth it. Also, where is the best place to get these spacers?
Thanks,
Juan

ninefiveone

Credit to Danno for figuring this out:

Front:
#901.331.671.01 72mm wheel bolts (stock is 45mm)#477.501.701 21mm wheel spacer (stock on rear of '82-85 944NA)
Rear Wheel
#901.331.671.01 72mm wheel bolts (stock is 45mm)#930.331.611.04 28mm wheel spacer (used on rear of 911-turbo)

Shoud cost about $170. All oem porsche parts so you should be able to order from your favorite source, paragon or the dealer.

Interested in selling your rear phone dials at all? I'm looking for a pair.

led

why the different spacer sizes?

ninefiveone

Semi-ignorance on my part but here's what I know:

pre 85.5 944's came with a 21mm spacer on the rear. '86 turbos do not have that spacer for some reason. You'll notice that the rears are inset a bit too much on the 86's. Why that works out to only a 7mm difference in spacers for late offset wheels I've no idea.

icat

When I added 993 Wheels to my '86 951 I used the following:

Front Wheels
911.331.671.00 Ten each 65mm wheel studs (stock is 45mm) - $3.70 each
477.501.701 Two each 21mm wheel spacer (came stock on rear of ’82-’85 944na) - Used from Oklahoma Foreign at $25.00 each

Rear Wheels
901.331.671.01 Ten each 72mm wheel studs (stock is 45mm) - $3.62 each
930.331.611.04 Two each 28mm wheel spacer (used on rear of 911-Turbo) - Used from Oklahoma Foreign at $50 each

If you use the 72mm studs on the front, then you will not be able to use your stock lug nuts.

JDR944

thanks a lot for the prompt responses, hopefully I'll be able to put the Boxster rims on my car sometime soon.

ninefiveone: I don't really plan on selling them because ideally in the future I will put sticky tires for autocrossing on the phone dials.

early85944

Or you can go with bolt on adapters. They are a bit more expensive but also easier to install and remove. Also, just a side note but when you change your studs, if you go that route you may want to invest in a set of steel lug nuts. They are not as attractive as the factory ones, but they are less prone to stripping

Danno

"why the different spacer sizes?"

That's to make up for the missing rear 21mm spacer. Porsche used that on all the early-offset 23.3mm cars except for the '86 944/951. That created a bizarre look where the rear wheel was inset 1" more than the front.

Also the front needs more fender clearance due to being able to turn the wheels. As Keith mentioned, you need the shorter studs in front to go with the smaller spacer.

zehnd

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Danno:
<strong>"why the different spacer sizes?"

That's to make up for the missing rear 21mm spacer. Porsche used that on all the early-offset 23.3mm cars except for the '86 944/951. That created a bizarre look where the rear wheel was inset 1" more than the front.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Sorry for hijacking the thread. If you have an early-offset car like I do, then I would only have to get a pair of spacers for the front (plus threads). Am I correct?

zakk

Anyone have a good source for bolt on adapters? My car needs some spacers since the PO didn't put them on. Also, are they any potential safety issues with bolt on adapters? I'm thinking more in a light track duty type scenario here.

ninefiveone

I favor the spacers and longer studs route. Bolt on spacers are 5 more bolts per wheel that need to be checked prior to track use.

led

So if my new rims are ET55 and my car is early offset I'd need 24mm up front and 31mm in the rear? Or do I stay with the earlier mentioned spacer sizes?

early85944

The factory used bolt on type spacers on the c2s made by Ralph Boothe. He makes an OEM quality spacer. Personally I would feel a little safer with bolt on spacers than used studs from a junk yard (Oklahoma Foreign). At least if you are going to go the changing of the studs route, buy new studs from zims for $3.00 a piece.

Cass944

this might be a dumb question but could it be cheaper to just find some used post-86 hubs and put them onto your car so you would have that later offset? or would you need all different brake rotors and stuff also?

Brian McCoy

FWIW - I had Jason @ Paragon price out the spacers for me (to see how affordable it would be - I'm sticking with phone dials):

PART NUMBER QTY
911.331.671.00 10 $4.06 ea.
477.501.701 2 $53.09 ea.
901.331.671.01 10 $3.94 ea.
930.331.611.04 2 $106.59 ea.

Basically $400 in parts (if you go new OEM), not including lug nuts if yours are all knackered.