911R wheel alternatives

[kenikh]

I just ran across these wheels:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=43956&item=7956426106&rd=1

They are 16 x 7 fuchs alloys purported to have the same offset as the 15" 911R wheels. Anybody have any idea what year car these were sold with? Has anybody mounted these wheels to a SWB 911? If so, can anyone offer up some pics?

[Jim Richards]

911R wheels have 49mm offset, if I remember correctly. The ebay wheels have the same offset as any non-R 7" wide Fuchs.

[kenikh]

Thus why I was dubious of the claim; the lip looks totally wrong. I wouldn't want someone buying these expecting them to fit their narrow body without rubbing. I just sent the seller a question asking him to clarify the claim.

[ubiquity0]

Those are standard 951 7x16 fuchs. Same offset as the 911 7x16's- nothing special at all.

[buster73]

Can confirm 7x15 R-wheels have 49 mm offset. 23.3 mm offset is standard for 7x15, 7x16 and 944 8x16.

[Plavan]

These are my wheels for sale. With the different backspacing they are similar to the 911R wheel. These will fit a narrow body car. Though they do not have the 911R offset, they will fit.

ubiquity0- The offsets for 911 and 951 wheels are different.

READ THIS POST 16x7's on the rear on a narrow body car?



The 911R offset is 49mm.

[kenikh]

(edit)
Just read Plavan's thread. VERY interesting.
Thanks for the heads up!

In the search for the appearance of originality, has anybody tried widening early 4.5/5/6 inch alloys? Has to be cheaper than the 6 grand for a set of real 911R wheels...

[Plavan]

Read above.

[Jim Richards]

Learn something new every day.

[kenikh]

Are those the same wheels as the No. 20 car?



BTW, why is the image not showing?

[ubiquity0]

Offsets for 911 7x16's & 951 7x16's are both 23.3mm.

The difference between the 2 is the increased brake clearance behind the spokes for the 951 wheel (achieved through the countersunk lug nut holes).

Offsets for 8x16's are different for the 911 & 951 wheels however (10.6 vs 23.3).

[Plavan]

Those wheels at Cal Speedway are the 16X7 911 wheels. I bought 16x7's specifically for this track. I run out of gear ( "V" 5th gear) going down the straights and banking, so I got a taller rear tire. It helped me carry more speed although I still hit the rev limiter.
My fenders have been rolled to hell and back so I was able to get the normal 16X7 911 wheels to fit (I wanted the extra track width without spacers) They rubbed a bit on the rt rear but not much.
I bought the 951 16x7 wheels just in case my "fender modifications" would not work with the 911 16x7 wheels.
What people do not realize is that they need to look at the lug hole depths on these 16x7 951 wheels. they are much different than standard 911 wheels.

[GeorgeK]

I'll second Ubiquity. The 951 7X16 will place the tire in *exactly* the same position as the 91 7X16. I have done that, owning about 10 of the 911 and 6 of the 951 7X16 Fuchs.
Plavan, trust me there is nothing to be gained there except room for calipers because of the different rim face.

[Wil Ferch]

This is wrong....

Simple math...

A 7" wheel is 177.8 mm.

With a 23.3 mm offset, this would equate to a 112 mm backspace....NOT 138 mm backspace as the add implies. ( 177.8/2= approx 89mm at the mid point. .....Add 23 offset= 112mm. Checks.

All 7" are the same backspace and offset....only the 951 is built with more clearance for brakes...a completely different proposition.

- - Wil

EDIT:
for proof..see here--> http://members.rennlist.com/1976c38/index.html

[kenikh]

EDIT:
for proof..see here--> http://members.rennlist.com/1976c38/index.html [/B]

This link is full of wonderful info.

[Plavan]

Well crapola. I am seeing the man AL Reed today. I'm still confused. I will have one 16x7 (951) and a normal 15x7 side by side. I'll take the actual measurements also. But it looks like I'm "punked"

[Plavan]

Will- a 7 inch wheel in not just 7 inches. a 7 inch rim is 7.6 inches= 193.04mm not 177.8mm you pointed out.
193.04mm - 177.8mm = 15.24mm difference
Now I'm getting confused

[Wil Ferch]

OK....7" is indeed 177.8mm if you simply take 25.4mm/inch.

now we're talking (possibly) rim forging/casting "thickness" . If so, then I would presume ( oh oh !) that Porsche "measures" the same way for each different sized wheel.

Now...if Porsche isn't consistent in whether ( or not) this thickness is routinely accounted for...then my friend...we're BOTH punked !

Wil

[Plavan]

lol. What I meant is that 7 inch wheel is not 7 inches across. It is 7.6 inches across. You have to take that into account.

[Jim Richards]

All of the 7" Fuchs are ~7.6" across. The width (7" in this case) is measured on the inside of the tire mounting flanges.