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YOUR RESEARCHOem 5mm spacers or aftermarket 7mm?
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Run stock springs
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I'm running stock springs but -0.7 degrees front camber and -2 degrees rear and the fronts will rub the wheel well with too big of a tire (265) but fit fine with 255 or slimmer.
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I can't speak from personal experience with a Porsche, but I have used spacers with several applications on Audis.
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Suggestion
RUF makes a 7mm hub centric spacer which I have on my car after replacing H&R's that I was experiencing some vibration with.
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Suggestion
not true, many people run 15mm up front and 7mm rears...
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Suggestion
Currently running the 7mm with extended bolts as well.
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I'm running stock springs but -0.7 degrees front camber and -2 degrees rear and the fronts will rub the wheel well with too big of a tire (265) but fit fine with 255 or slimmer.
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Suggestion
Only issue I had with the H&R 5mm spacers was using the extended lugs my kit came with; they were garbage and I had to buy the GT3 extended lugs, which work great.
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Looking to get wheels more flush with the fender
Worried that after market 7mm spacers have no hub centric flange with a few peeps reporting vibration...worried oem 5mm won't make appreciable diff... Anyone with first hand experience and pics care to comment
I can't speak from personal experience with a Porsche, but I have used spacers with several applications on Audis. I would never run a non-hubcentric spacer on a car designed to be hubcentric.
If you go aftermarket, I have had the best experience with H&R spacers.
As for fitment, the more aggressive you go the more chance of rubbing. I like as wide a stance as possible for the best look. However, it often means a bit of trial and error with different thickness spacers.
Good Luck!
I needed a 5mm spacer for my fronts with aftermarket wheels and snows. It mounted directly to the hub via set screws. I don't notice any appreciable difference in the look.
5mm is hardly noticeable but fits well in the front. I'm running stock springs but -0.7 degrees front camber and -2 degrees rear and the fronts will rub the wheel well with too big of a tire (265) but fit fine with 255 or slimmer. The rear wouldn't be "flush" enough cosmetically speaking; I don't run spacers back there and even a 315 width tire wasn't close to touching the fender. Only issue I had with the H&R 5mm spacers was using the extended lugs my kit came with; they were garbage and I had to buy the GT3 extended lugs, which work great.
RUF makes a 7mm hub centric spacer which I have on my car after replacing H&R's that I was experiencing some vibration with. I second knfeparty's recommendation, be sure to get quality lug bolts.
Porsche OEM 5mm kit includes extended lugs...
Anyway guys what do you think about the diff between 7mm and 5mm ? I found RUF 7mm hubcentric with extended bolts for $400. Porsche OEM 5mm with extended bolts and security locks for $329. If visually there's no diff maybe I'll stick with OEM...
Another question to those who bought 7mm aftermarket and 5mm Porsche spacers.
Do the 5mm Porsche have wheel centric flanges or is completely flat.
Does the actual hub have enough of a flange that protrudes out that you don't need the wheel centric flange on 7mm or thinner spacers? I keep reading of people even with 7mm spacers having vibration problems with the completely flat disc...
Does 2mm make that HUGE of a difference?
Are these stock wheels, or aftermarket?
Are you trying to camber the wheels?
Are they going to hit the fenders?
Why not just mock it up using a stack of washers between the wheel & hub? Try a 5mm stack and a 7mm stack under 3 or more lug bolts and see how you like the offsets.
The hub flange doesn't protrude out of the 7mm spacer. I paid $158 for two Ruf 7mm spacers and $70 for ten lug bolts so $400 sounds a tad high. pm me if you want more info.
You might check out
OTIS Inc.
for wheel spacers and bolt kits. CNC machined in the USA, Alcoa 6061-t6 billet aluminum, hub-centric, wheel-centric (only spacers over 7mm), and top quality wheel bolts...
They sell them in different spacer width, pairs of two, sets of four, etc. but for example, a set four spacers and twenty bolts is is $260. A few dollars more in black instead of natural aluminum.
If you are using OEM wheels, OEM size tires, on a narrow body 996, I think 7mm in the front and 14mm or 15mm in the rear is about right (
link to four spacer kit
)
The FVD 7mm spacers are hubcentric which is why I bought them. Also 5mm spacers is the most amount of thread you would want to lose in locking your wheel in. It seems Porsche even added 5mm length in bolts to compensate for the 5mm spacers. You can get away with buying Porsche lug nuts to save money if it is cheaper and just lose 2mm thread.
Just so we have the terminology straight, when referring to spacers,
my understanding
is that:
Hub-centric
means that the spacer itself is designed to fit perfectly on the factory hub lip, as opposed to a spacer that just centers on the lug bolts.
Wheel-centric
means that the spacer has an additional protrusion lip that the wheels can sit on. I've never seen this in 5mm spacers, as the factory hub lip still protrudes past a 5mm spacer. I think most 7mm spacers are also not wheel-centric.
I used
http://www.motorsporthardware.com/porsche/
and was very happy with them. I have had no problems with vibration or shaking of any kind. Currently running the 7mm with extended bolts as well.
From my understanding they make a lot of the H&R stuff.
No affiliation
Hi guys - I know I know - don't always listen to the dealer, but I was talking to the shop foreman at my dealer who I really trust (not the service advisor). He said that on Porsche cars with existing warranties and using OEM spec wheels, the factory will not warranty wheel bearings or suspension components on anything with over 5mm spacers in the front. (rears can go up to 17mm)
That's why Porsche only recommends maximum 5mm spacers in the front with factory wheels and 17mm max in the rears.
The 17mm do kick up a ton of dirt on the sides of the rear bumper so I am going to go with 5mm Porsche OEM spacers all around.
I know many of you have gone with 7mm without problems - but I looked into the price for 7mm spacers with wheel centric flanges and for a complete new set of longer, locking two piece bolts and they're all coming in more expensive than the Porsche 5mm set.
For a 2mm difference, I figure I'll just go with the Porsche 5mm set.
And finally I saw this post from an old timer and that sealed the deal for me. Perfect amount of extension without looking over done...
Would not even buy 5mm spacers and waste the money. I would buy wider rubber instead to get the benefit of extra grip and look as extra. IMHO
Here is my old car sitting on 7mm rear and 15mm front FVD spacers
https://rennlist.com/forums/8451182-post8.html
ALways admired your car and the stance!
Anyway I know I'm probably being too conservative but I really do like the various 5mm spacer pics I saw online from at least a half dozen owners...so I placed a call to Sunset Porsche in Oregon - they have it on sale for $300!
Will post before/after pics
If running oem specs on wheels, 7mm front and 15 rear will be perfect. If you put 15 on front, the tires will rub the inner wells at full lock, unless you use a heat gun on the wells and then it should be fine. 7/15 is the easiest.
I also bought the FVD Brombacher hubcentric 7MM (actually 7.5mm, IIRC) all around, and they come with high quality longer bolts as part of the price, as well as the screw that holds the spacer in place to the disc for when you remove the wheels. Smooth as silk, no extra balance wieghts were even required. Highly recommend. I've got a post with pics on here somewhere. Especially noticeable if you lower your car at all, like I did with PSS9s.
Thanks all.
I decided to follow my master techs advice and be conservative
Went with the Porsche Oem 5mm kit with new security bolts.
Hopefully weather is good enough tomorrow for me to install them and put the winter set on
Here are the winter tires and wheels w/ the new Porsche 5mm spacers.
One thing I noticed about the OEM 5mm spacers is that they're not simply flat. The area around the center hole is machined to allow the hub's flange to protrude all the way out to make sure the wheel is hub centric.
Personally 5mm isn't worth the hassle/cost on a factory offset wheel for the 996. The main reason to have spacers is for looks and I don't really see 5mm making any noticeable impact in that department. But if you're happy with them, that's all that matters.
^^^ +1
5mm-7mm are flat and uses the cars built in flange to be hubcentric. They are to thin to make with a hubcentric lip because of this flange. So, it's not a OEM Porsche magic thing. 14mm is where it starts for the spacers to have its own flange to be hubcentric.
I went with the Otis 7/15 mm package with bolts and couldn't be happier. Huge improvement in looks, no vibration. Quick shipping from Otis, they even called me prior to shipping to insure that I was running OEM wheels so they sent me the correct seat lug bolts.
RUF 7mm spacers have centric flanges. The car's hub flange is actually three "tangs" that center the rim and not a full flange that is a complete circle or solid for 360 degrees. The RUF spacer has three "tangs" placed where the hub tangs are not present. Thus they are hub centric. If that made any sense!
those 7mm ruf spacers are great, but not needed. If you look at this ruf 7mm spacers, the hub still have enough "tangs" sticking out to center the wheel.
True... I always wondered if these additional tangs helped center the spacer as well and helped eliminate any vibration? I know when I went from H&R's without tangs to Ruf's it eliminated a small vibration I had. I don't want to pull off a wheel right now but I'm pretty sure my Ruf's don't have two mounting screws as yours.
