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YOUR RESEARCHTitanium lug bolts
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Replace wheel locks
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The other 4 are from ~2016 when I replaced the wheel locks with regular bolts so I don't have to fuss with the lock socket.
Leading evidence: 'Replace wheel locks' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace do your diet or exercise regimen' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
As will a minor change do your diet or exercise regimen!
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Suggestion
Centre locks are used to decrease tire change times on race cars.
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Some people do, i dont. the weight they save is so inconsequential as to be not worth discussing. they are pointless with thr exception of looking nice. downside..i dont think pca allows them for track days
What I love about the 996 is its light weight. If any stock-looking mod could make it even lighter on it's feet, I'd be all in. In theory at least, reducing unsprung/rotating weight has a bigger impact on performance than reducing weight in other areas, but I'd still guess that the weight savings with titanium vs steel lug nuts isn't enough to make a difference in performance or driving feel. If anybody has ever felt a difference after using titanium lug nuts, it would be interesting to hear more about that.
For looks alone, there are always these:
https://www.pelicanparts.com/More_Info/PELPP913510.htm?pn=PEL-PP913510&gclid=Cj0KCQjwgMnYBRDRARIsANC2dfmF2duI6oyFA7G-nY2NWC5IOaGhYt8ZZqcyRaFFVxc1hCUTTmQ_-JwaAoB6EALw_wcB
https://www.pelicanparts.com/More_Info/PELPP913511.htm?pn=PEL-PP913511&gclid=Cj0KCQjwgMnYBRDRARIsANC2dfl0SQcTPS7rzzRXe33njTFqelutY7sqf c2nhdhOzRj8FRXrqd-WGLwaAvofEALw_wcB
While titanium lug nuts will shave some weight, remember that the lugs are close to the wheel center, so their rotational weight benefit is miniscule. Their total unsprung benefit is slightly better.
BUT........
....using a dissimilar metal leads to problems with galvanic corrosion and the bolts loosening up faster. Both of those things are bad.
On the street, or even a track day, with a mostly stock vehicle, you will NEVER see a benefit other than style points in the pits.
If you have a full blown, carbon fiber/unobtanium, full on race car that is on the grid at LeMans, THEN titanium lug bolts are a viable option.
But we ain't that.
Cheers.
Great point! The aluminum lug nuts on the old 911's were crazy light. I never stopped being amazed every time I picked them up. I guess the cars produce a lot more power now, but I wonder why they don't have bolts now that are closer in weight to those on the old 911s.
Anything new on Ti lug bolts? I did my front brakes today, and noticed the collars on one of the stock bolts is cracked.
I saw these on Pelican, look better than my original rusted ones.
https://www.pelicanparts.com/cgi-bin...0set%20of%2020
I'm a little confused why these are labeled as 28mm long. Isn't stock 45mm?
I guess they are now PCA approved.
Or should I just get a new set of OEM bolts? Ti is like $70 more than a complete Genuine Porsche set. Since the Ti is unpainted, I'd never have to repaint them, which would be nice.
I never thought about this until reading this thread. Whenever I am changing out my wheels with CenterLocks I am always cursing Porsche. However, I think there is a benefit in rotational mass since all of the centerlock nut is in the center.
As others have said, not enough to make a measurable difference. The amount of gas in your tank will drastically outweigh (pun intended) the effect of lug bolt material. As will a minor change do your diet or exercise regimen! No need to spend money in this area. Stick with the proven, reliable, inexpensive product.
Just as an FYI the original 996 bolt design has been superseded the new 997 part has a dimple in the middle of the bolt head and the head is slightly shorter.
Sets of the original bolts are difficult to find as most suppliers will have an image of the original bolt then send you the new ones with the dimple.
If anyone is interested I have two sets for $300 shipped for each.
They were removed from my cars I sold. All my other cars use them. What people hypothetically are saying has never once happened to me. Being that they Have never became loose or stripped out. Nor have they ever had an opposing metal reaction.
After having three of five aftermarket fasteners on my rear driver-side wheel fail simultaneously - at street speeds, on level ground, while driving in a straight line - I would discourage folks from bothering with non-Porsche studs/bolts/etc.
For the record: theories including any of the following data points are not required, thanks:
* Everyone and their mother uses them
* I'm the only person to whom this has ever happened
* I am obviously stupid and/or installed them improperly
Interesting, me too. 16 of the bolts on my car are from ~2001 when it was made. The other 4 are from ~2016 when I replaced the wheel locks with regular bolts so I don't have to fuss with the lock socket. All 20 look identical to me, I can't tell them apart.
Grabbed world-motorsports titanium bolts last year, haven't had any back-out issues (drove from Chicago to Austin and back as well). Weight for them is 2.9 Lbs or roughly 1300 grams for the set.
Titanium fails abruptly unlike steel. It�s not a durable or longevity friendly metal. It�s for race cars not street cars and not for street cars sometimes driven at the track. Don�t believe me, go figure out what happened to the titanium submarines Russia built.... they were light, fast, deep diving.... and then they weren�t.
Now we are comparing submarines to lug bolts? Just because a sub failed it doesn't mean a lug bolt will too. They make motorcycle engines with titanium valves, my dirt bike is one of them and they are not known for valve failures.
1). Most here lack a sense of humor.
2). Most here can�t comprehend simple analogies.
3). Common sense is quite often the most uncommon thing.
Go do research on the brittle fracture properties on titanium alloys versus other alloys such as steel, aluminum, or even inconel and monel. Simple explanations don�t require dissertation level explanation.
Titanium fails abruptly and suddenly, simlarly like IMS bearings, with little to no warning. Steel is very forgiving and far more durable.
I could prattle on about stress, strain and toughness of alloys and how to measure each, but you wouldn�t get it. I have a book I can recommend or two.
The titanium submarines failed castrophically just like anything designed to be durable might when made of titanium. That�s why anyone that knows about metals would not recommend titanium lug nuts to save a few ounces. The people selling these kinds of products are after your money, I am not. Remember that if you can�t remember anything else.
F1 did a lot of parts in magnesium too, that also didn�t translate well to the non-racing world. Not all racing technology is good for your commuter.
This forum is amazing.... got folks that will worry about hydrolocking an engine in a car wash, but will ignore the brittle fracture properties of titanium, because light and bling.....
I agree that it's a total waste of money but you can't say just because it failed in one application it will do the same in another. Sounds like you are in engineering like myself so it shouldn't be a surprise if I ask where did you get your data that titanium lug bolts are prone to failure? Most failures are due to poor engineering, manufacturing and lack of testing.........or comes don't to chance. What are the chances that X% or more will fail and cost more money to the company in litigation that profit.
Not into the raging debate. I got a set about two years ago. I did so because they don't rust like my old ones did. They have never backed off, broken or anything else but sit there looking beautiful even when I am slightly negligent cleaning up the wheels. Somebody compare the material specs with standard lug bolts here
https://www.world-motorsports.com/po...-bolt-set.html
old rusted lug bolts with adjacent titanium lug bolt
not much to say
Depends. Porsche OEM wheels use the floating collar design and is slightly more bowl shaped. Aftermarket wheels use the more conical shaped non-floating collar design. It is very important to note which type of lug bolt your wheels require.
