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YOUR RESEARCHYour thoughts, experiences with spacers
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Use 8mm front and 15mm rear
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I am using 8MM front and 15MM rear on a 2006 Cayman.
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Suggestion
I would remove them if I was running tire chains, though I never will be doing that.
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Suggestion · Original poster
I mention 5mm simply because that is a size that Porsche sells for use front and back.
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Even Porsche sells them. I'm not a big mod guy but curious about...
Assuming stock wheels, Porsche approved original size tires, no other suspension mods...putting 5mm spacers front and back...
1. Effect on steering feel at the steering wheel and in terms of turn in and straight line stability, and stress/wear on steering system.
2. Does installing spacers require realignment or rebalance?
3. Since the weight baring center on the axles has been moved outward, is there any effect on wheel bearing life?
4. Body clearance turning lock to lock, and under full compression of the suspension.
5. If using the spare, do you remove the spacer and go back to standard length lug nuts?
6 Must you remove them if using chains in winter?
7. What happens when using them on the track?
All opinions and experiences appreciated
Other than adding just a little weight there's no negative. It's a great way to get proper ET on lug-bolt wheels. I have 15mm's all around to get my BBS LM's to fit flush with the fenders. I have used them on my VW's for years now with no problems at all.
My experience-
I am using 8MM front and 15MM rear on a 2006 Cayman.
There are technically greater loads on wheel bearings and other suspension components with added spacers, but if the car is not tracked to 9 or 10/10ths I don't believe that the loads are detrimental.
I could just barely tell the difference in steering and feel at first. Other things like size of wheels, size of tires, brand of tires, etc. will produce a greater difference in feel than the spacers do.
You do need to check clearances. I don't know what spacers are considered "safe" for the 996.
8 and 15 are safe for the mid-engine car.
I would remove them if I was running tire chains, though I never will be doing that.
Don't know that it matters whether the spacers are on or off with the spare tire on a 996.
The Cayman does not have a spare....
I've read differing opinions about whether an alignment is necessary. Rebalance should only be necessary if the spacers are poorly made or poorly fit causing an imbalance.
Thanks for the detailed reply Spokayman.
I mention 5mm simply because that is a size that Porsche sells for use front and back. At that size, front and back, the extension is 10mm. But 8mm front means an extension of 16mm...over 50% more. And 15mm would be 30mm or 300% over normal.
If 9/10th and 10/10th driving would begin to cause premature wear on wheel bearings at 8mm, than I think it would also begin some sort of degradation at 8/10th and even 7/10ths. The 15mm spacers would cause me real concern.
While 5mm is less, the principal is the same. Even if Porsche offers them as a cosmetic option, I'll talk to Porsche about possible wear issues before considering them.
It reminds me of when I went vintage racing. Modern tires had so much more grip compared to original period tires that suspension parts needed to be re-inforced to keep from being ripped out by the higher g forces.
I was a docent at the Los Angeles County Museum of Art...this was my "official" photograph...the scratches and squiggles were just my nod to modern art.
This is a source reference. Confirm exact model applicability in the original material.
