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Early 930 vs "late" 930 wheel offsets?

Hey guys.

I recently started looking at some traditional black center wheels for my 79' Turbo. There are many threads on wheel fitments but they are hard to follow and do not specifically say what I need to know.

1. Can later (85-89) stock 930 turbo wheels 7x16 and 9x16 bolt up to my car? Unknown offsets...

2. What "spacer" are people referring to when comparing the early and later 930s. Why would a spacer be needed I thought the cars are almost identical.


Thanks.
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Old 10-09-2019, 12:14 PM
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I have a "late" 930. IIRC, off the top of my head the front hubs were slightly different (early vs late). And my late 930 has stock 28 mm spacers on the rear.

Wheels for my later car: front 23 mm offset, rear 15 mm offset.
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1987 Venetian Blue (really looks like grey) 930 Coupe
Old 10-09-2019, 12:57 PM
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Quote:
Originally Posted by rxtrom View Post
Hey guys.

I recently started looking at some traditional black center wheels for my 79' Turbo. There are many threads on wheel fitments but they are hard to follow and do not specifically say what I need to know.

1. Can later (85-89) stock 930 turbo wheels 7x16 and 9x16 bolt up to my car? Unknown offsets...
Yes. See Bill V's sig for his wheel page https://members.rennlist.com/1976c38/wheels.htm

Quote:
Originally Posted by rxtrom View Post
2. What "spacer" are people referring to when comparing the early and later 930s. Why would a spacer be needed I thought the cars are almost identical.


Thanks.
Early 930's used the same front hubs as 911s and had a 1" spacer (I think - pretty sure) from the factory. Late 930's had that spacer incorporated into the hubs themselves.
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'77 S with '78 930 power and a few other things.
Old 10-09-2019, 01:01 PM
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Quote:
Originally Posted by rxtrom View Post
Hey guys.

I recently started looking at some traditional black center wheels for my 79' Turbo. There are many threads on wheel fitments but they are hard to follow and do not specifically say what I need to know.

1. Can later (85-89) stock 930 turbo wheels 7x16 and 9x16 bolt up to my car? Unknown offsets...

2. What "spacer" are people referring to when comparing the early and later 930s. Why would a spacer be needed I thought the cars are almost identical.


Thanks.
All 930 from '74 through '89 used the same 7ET23.3 Fuchs in front as was used on the various 911s, early was 15 later was 16(width & Et are all the same) Through '80 all 930 used the same hubs as a 911 but had a separate 21mm spacer(930.341.611.00) from '80 on the front hub was changed to a design that was o/s 21mm a different rotor was used in conjunction w/ it. The '78 -80 930 front hub & rotor can be used on a 911 the later '80 up can not. '80 was a transition year, early cars had the old design later the new design.

In back the earliest cars used 8x15ET10.6, switching to 8x16ET10.6 and later 9x16ET15. Through '77 they use a 54?mm spacer 930.331.911.04, in '78 the semi-trailing arm was beefed up and widened so a 28mm spacer was used from then on 930.331.611.04
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Old 10-09-2019, 02:39 PM
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