I have a new (to me) set of Sport Technos (18x8, iirc, and 18x11). As many know, these are sized to work with 996 NB or WB cars. With WBs, they require a 17mm spacer to achieve standard 996TT wheel offset, which I have installed.

All is well, except I've always enjoyed the "pushed out to the corners" look I had previously with 19s. I estimate another 3/4" (17mm) would be perfect, but that would mean a 34mm spacer, or thereabouts.

I haven't checked to see if anything bigger than 30 even exists, but even a 30 would help a lot if that's what I had to settle for.

Just wondering if:

1) could one stack two spacers to get 35mm, or is that not done?
2) is there an inherent problem with big spacer widths as opposed to the proper wheel offset to get the same spacing?
3) where's the best place to get a selection of spacers?

I've only had small spacers before on other Porsches, so this is new to me.

Thanks!

 

from my experience huge spacers use 2 sets of bolts to connect the wheel to the hub. 1 set connects the spacer to the hub and the 2nd set connects the wheel to the spacer. using a single long bolt leads to breakage due to the stress.

your looking to push the wheel out approx 1.5" which could put undue stress on the hub bearing as well.

 

What's offset of Sport Technos?

Do not stack spacers.
IMHO, anything more than 20 or 25mm should be a 'bolt-on'.......they are avail up to around 65mm (heaven forbid) .
Downsides of spacers....well, it's great if you can do it right and have wheels the correct offset w/out spacers but life will not end if you use spacers.....everything has some trade-off....using spacers generally has little downside (not taken to an extreme).
H&R is probably the oldest best known brand of billet aluminum spacer....they call their bolt-ons DRM series. Others are out there.

People who have original hollow twists (50mm/45mm) F/R often put 14mm both front and back. If the car is lowered I can't imagine wanting to go further out than that with 8J/11J 18" fitments.....that's a total offset of 36/31 F/R.....fills the wheel arch (and hopefully your suspension is stiffened).
Here is a very old example pic of that.

 

thanks for the info guys. That pic right above looks great!

Sport Technos are 18x8 (50) and 18x11 (63). Standard Turbo Twists look to be 50F and 45R, for the same size wheels.

I just checked my spacers out (they were installed by my shop a few weeks ago when they were setting up my suspension.)
They are H&Rs and the part numbers indicate rears are 15mm, fronts 7mm. Suncoast Porsche's website (and other places) indicate "for fitment to widebody Porsches 17mm spacers are necessary (not included.)" That sounds like 17s for all 4, yet the fronts seem to have the same offset as the stock wheels, which run no spacers.

Sorrry for possibly dumb questions, but it sounds like Porsche calls for 17s all around, and I currently have 15s and 7s. So perhaps if I were to go with 20s or even 25s I could get the look in the above picture? GreggT, your post seems to indicate there is a formula. I didn't realize it was that simple. Do you just subtract the spacer number from the wheel offset number to come up with the effective offset?

Thanks for any help and suggestions.

 

While I don't run stock twists now, I did, and have same offsets on my BBS's. I run 18 in the rear, and 7 in front, even with a lowered car. Zero rub or turn issues. They are nice and flush. Good stance.

As to custom or odd spacers, look to the right. Adaptec speedware (Lenny) makes every size, and is extremely reasonable compared to some other vendors offering.

https://i.imgur.com/M978O81l.jpg

 

I question whether Porsche 'calls for' 17s all around.....in the rear yes (where it is a wide-body) and 17 there would result in 45 total offset (same as OE twists).

Yes....the formula is simple......offset or ET means 'pushed-in'....hence the amount pushed-in relative to fender line. Adding spacers places the wheel out further (pushed in less).....so you subtract it's thickness from wheel ET for the resulting ET (offset). If you change wheel width there is another math step but easy.
Bottom line.....if you want those narrow body wheels to sit in the wheel arch like the pic.....you need 14mm up front and 32mm bolt-on spacer in the rear. H&R makes 32s.......I think they are around $200. a pair. 32s are about 1 1/4" thick.

What you see in that old pic is an effective offset of 36/31 (F/R). If you have 8J and 11J then your end-game s/be ballpark of those 2 numbers. Please note....others have their own opins on the 36/31 so that is not the holly grail....just ball park. For instance I have a similar car with 42/30 19" (8 1/2J 11J bling street wheels).

 

Sadly, Adaptec (at right) no longer seems to have a website.

 

Great info! Super. So I could just move my 15s from rear to front and buy a pair of 30s or 32s and that would likely do it.

And the 32s would require two sets of bolts as described above, is that correct? I suppose if H&R sell them that big there must not be a problem with them? Or are there different opinions on that?

EDIT: Just checked their website (http://www.trakplus.com/) and it looks like the 55mm and up come with the extra bolts, but everything smaller is just one long set of bolts. I'll confirm with them, of course.

 

Further Edit: 23mm is the largest of the DR series that comes with no extra bolts. The 30 and up (DRA series) require that you bolt the spacer to the hub with one set of bolts (supplied) then bolt your wheel to the spacer with the standard bolts for your wheels without spacers.

I have a set of 30s on order, and will try the 15s that are currently in the back on the front.

Thanks again for everybody's help. I'll post up before and after shots when they come in.

 

let me know how the 15s up front look. I'm thinking of running my 15mm that are on my rears and moving them up front and then putting a 23mm on the rear. Gotta scrutinize some measurements on the car. I'm on the factory wheels on my 03 TT

 

Will do. I'll shoot the exact same angle with both.

 

Hey guys,
We can build you anything you want, and build Porsche spacers all the time.
Stacking spacers is not a wise thing to do..

The way we build them they become a natural extension of the Porsche hub and are problem free - Lifetime guarantee, no vibrations, and if you need hardware we sell only the best we can get our hands on. We don't take shortcuts.

We didn't know that the banner link was broken and we thank you for bringing it to our attention.
Our website is motorsport-tech.com if you would like to browse around, or give us a call at 775 351 1000.

 

Thank you! Saves me the effort of shifting them around (only to shift them right back)I have a lot of camber in the rear in order to keep the toe within limits. If I do anything like the 23mm on the rear I'll be sure to document it with some decent pictures too.

I'm going to park the car on a level surface, and make some sort of a plumb-bob contraption to tape onto the fender and see exactly how much room I have. Also plan on putting one wheel at a time up on the driveway curb to see what kind of clearance I have when I'm compressing the suspension (bumps/cornering/etc).