wheel spacers on widebody

[djcdmv]

I 've searched the threads and have seen some people put too big of spacers on and ended up hitting the tire on the wheel well.

Does anyone know the stud length and widest spacers to get to fill out the fenders of an M491 front and rear with original Fuchs? Thanks in advance.

[JeremyD]

What size fuchs? 7's and 8's? How low are you? On a properly set up turbo bodied car (like the m491) you can fit some serious rubber.

[stormmaster]

m491s don't use spacers on the rear.....just a 16X9 Fuchs wheel....

[Wil Ferch]

Stormmaster:
I don't think that is universally correct.....some M491 used 8" rear Fuchs with spacers. I've seen 21 and 32 mm spacers used for 930/M491...and it changed over the years... IIRC.

[stormmaster]

My apologies....was speaking from my brothers 89 m491....however from my understanding the difference between the 8 and 9 inch Fuchs is all on the inside depth not the outer depth.

[Wil Ferch]

Quote...." however from my understanding the difference between the 8 and 9 inch Fuchs is all on the inside depth not the outer depth...."

That's incorrect also....

See this posting ---> my post # 4 within---> http://forums.pelicanparts.com/porsche-911-technical-forum/290040-anyone-have-928-21mm-spacers-911-a.html There, I say ( by verifying records)-->

"... Basically, a 911 8" Fuchs places all of its extra 1" width ( compared to a 7" Fuchs) toward the outside of the car, relative to the original mounting hub. Therefore , when I added a 21mm spacer with my 7" Fuchs.... it was just shy of the 1" ( 25.4mm) extra width that a 8" Fuchs ( w/o spacer) would have done for me. It means I could have gone another 4 mm to "exactly" place the outside edge of the rim like a 8" Fuchs would .

However, you're starting off with a 8" Fuchs. By comparison, a 9" Fuchs ( w/o spacer on the original mounting hub) would place * it's * extra 1" of width the following way... an extra 10 mm toward the outside...and an extra 15mm toward the inside. Not all 25 mm is toward the outside !..."

[WIL84911]

Originally Posted by stormmaster

.... from my understanding the difference between the 8 and 9 inch Fuchs is all on the inside depth not the outer depth.

That's what I also thought...

[Wil Ferch]

You thought wrong....check the backspace and the dimensions....and do the math...or draw it all out on graph paper.

Then there's this...there are 2 different 8" Fuchs. Maybe you're thinking a comparison of 9" Fuchs with 944/951 8" Fuchs.

[WIL84911]

OK... thanks for the clarification.

[Bill Verburg]

these were used on a '79 930 w/ 7 & 8" Fuchs
pn#477.501.701 hubcentric 21m
pn# 930.331.611.04 hubcentric 28mm

additionally there is another 21mm spacer pn# 930.331.611.04, one of the 21's is much more expensive than the other so check prices

[Chuck.H]

My '89 factory TL came with 9" Fuchs, and huge rear spacers (like 52mm maybe?). I have the m491 on the hood option plate and from what I can tell it (was) all original.

When I changed the wheels to kinesis 17x11's I cut down these rear spacers to about 30mm to just fit the tires inside the wheel wells. 315/35's fit with no rubbing!

HTH,
Chuck.H
'89 TurboLookTarga, 320k miles

[Wil Ferch]

I just checked my notes and back to the question of the 2 styles of 8" Fuchs....

911.362.117.00 = 911/930 style and has 10.6 mm offset ( about 112 mm backspace)

951.362.117.00 = 944 Turbo/951 style and has 23.3mm ofset ( about 125 mm backspace)

So....The 951 version of the 8" Fuchs brings the wheel about(12-13 mm) or 1/2" more "in" toward the car compared to the 911 style 8" Fuchs....so NOW compared to a 9" Fuchs...almost all of the extra width comparing 9" to THIS, 951 style 8" Fuchs, is on the outside.

[Bill Verburg]

Originally Posted by Chuck.H

My '89 factory TL came with 9" Fuchs, and huge rear spacers (like 52mm maybe?). I have the m491 on the hood option plate and from what I can tell it (was) all original.

When I changed the wheels to kinesis 17x11's I cut down these rear spacers to about 30mm to just fit the tires inside the wheel wells. 315/35's fit with no rubbing!

HTH,
Chuck.H
'89 TurboLookTarga, 320k miles

The rear spacer on an '89 TL is the 28mm, 930.331.611.04, noted above

[80-911SC]

ooooouuuch ........ my head fuch'ing hurts from reading that ....

thanks guys ........ although the info is greatly needed .....

most don't know what fuch they have on ........ but they do look fuch'ing awesome if righ

[djcdmv]

Thanks for the help. I may be an idiot, but I think the rears are 8". The tires are 225/50/16 if that means anything. I'm including pictures for your opinions. I just think the tires front and rear need to be pushed out a bit so they don't look like they are so far inside the wheel well.

[Wil Ferch]

Dave:

Look here for what you will find as to identifying markings on the backside of the wheel....on the spoke area--->

http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/564841-fs-one-genuine-fuchs-7-x-16-wheel.html

If you take one of your wheels off...and get the grime off the spokes...you will see 8J x 16 if it's a 8" wide wheel. The part number will tell you if its a 911/930 pattern 8" wheel....or if its a 944/951 pattern 8" wheel which has a different offset and brings the 951 wheel "inboard" (toward the center of the car) another ~ 1/2" compared to the 911 pattern.

I thought the turbos and turbo look cars were fitted with 245/46-16 rears?. Maybe you have 7" rims with the 225's of the narrow body car on your wide-body?

[JeremyD]

That's why I asked - earlier turbo look had 7's and 8's later cars had 7's and 9's.

Tough to tell by looking at the difference between the 8's and 9's - most of it comes from the more recessed lug holes.

You can measure the approximate distance from the outside of the tire lip to the inside of the fender lip and then look for spacers of that distance (I did that on my 1987 carrera) amazing how close I could get with a ruler.

Remember too - that tire sizes by manufacturer can also differ. All things to ponder

[stormmaster]

Thats also why I sent a set of 16X7 Fuchs to TruDesign in Colorado. Turned them into 17X8 and 17X9.5....They fill my wheel wells quite nicely and no spacers of any kind are used...I got to choose the backspacing I wanted.

[djcdmv]

Originally Posted by stormmaster

Thats also why I sent a set of 16X7 Fuchs to TruDesign in Colorado. Turned them into 17X8 and 17X9.5....They fill my wheel wells quite nicely and no spacers of any kind are used...I got to choose the backspacing I wanted.

How pricey is that?

[TKO]

Will F, Bill V, or others:

Did both widebody years (16x8 and 16x9) use the 28mm spacer for the rear? Or, did only the 8's get the spacer? If only the 8's used the spacer, does that mean the outside face of wheel/tire was actually further out then 9's???

Thank you in advance, Merry Christmas!