C2/4 wheels on 1984-86

How difficult is it to put later model wheels (1991-1994) on 1984-86 911? How do you determine if spacers are needed? Is it safe to use spacers?
Thanks

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1984 Targa

The socalled Design 90 wheels have a different offset than your original wheels. Therefore you will need spacers. However I can't recommend you what sizes to choose. Maybe the difference between original offset and new offset tells the size of spacer needed?

Can anyone else help me on this? Thanks!

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1984 Targa

I agree, somebody has to have experience on this?

My 84 911 has 6x15 at the front and 7x15 at the rear. Offset (as far as I can remember) is 39 front and 23 rear. I can't remember the offset on the Design 90 wheels either, but I know that they have quite different offsets (maybe 52 or something like that). This means the wheel will sit much logner in under the car and therefore you'll need spacers. It seems to me that finding a spacer in the same size, as the difference in offset between the new and old wheel is, might be the solution. That way the wheel will sit in the same place as before (except if you go for wider wheels where you need to compensate).

I've seen 2 SCs here in Denmark running with Design 90 wheels so it can in fact be done.

Do you know the offset for the new wheels?

[This message has been edited by Mikkel (edited 11-16-2000).]

The Design 90 wheels have offsets as follows:
(all 16")

wheel width
6 - 55.0mm
7 - 52.3
8 - 52.3
9 - 52.3

By the way - I have a set of these wheels that are chromed for sale (6 & 8's) $400.

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Tom Sharpes
90 C2 Targa
http://members.rennlist.com/5150targa

If you are going to use 7" in the fronts, you will need 1" adapters. If you are using 9" wheels for the rears, then you will need
1 1/2" adapters. If 8" on the rears, then you can go with either 1 3/4 or even 2" adapters. The applications for these would be for narrow body Carerras and SCs.
Ive got a set of adapters that Im selling if anyone is interested. Adapters are safe to use but forget about using spacers.

I'll get back to you on the size of my spacers. I have the 89-94 C2 cup wheels (16x 6s & 8s) on my 82 SC. The cup wheels should have the same offset as the Design 90s. Spacers have been in use for years and I have never heard about any safety problems.

John
82 911SC project

FYI - I have 2" spacers on the rears and 1" upfront for my 16x6 and 8s.

Good Luck!

I guess I don't understand how the spacers work. It seems to me that if you used a 2" spacer there wouldn't be any thread left for the lug nuts!
Also, can someone explain how to measure offset?
Thanks

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1984 Targa

[This message has been edited by Blizzard (edited 11-18-2000).]

Can someone help me out and explain how spacers work. If a 1" space is used how do you have thread for lug nuts?
Thanks!!

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1984 Targa

FYI--If you use spacers, you'll have to change your existing studs to longer ones in order to compensate for the spacer. If you use adapters, you will no longer have to worry about changing your studs to longer ones as the adapters already have studs built in them. The adapters mount on the factory studs that are on your car, and the studs mounted on the adapters are then used to mount the wheels on the adapters.