Need source for 100mm wheel studs

[Chuck Moreland]

Bought a set from our host. But, they have an extended non-threaded portion at the base. They can't be used with a standard Fuchs without spacers. The non-threaded section is probably 1/2 inch too long causing the lug nuts to bottom.

I'm planning to run a variety of wheels, some with spacers, some without.

I need a set that are threaded down to the normal level such that wheels can be fitted sans spacers. Anyone know a source?

[J P Stein]

A die of the proper thread would be cheeper....dunno if the material is too hard for a die to cut, but it would worth a shot.

[Grady Clay]

Chuck,

The ones you bought from our host are probably the good forged ones with rolled threads. There exist some aftermarket wheel studs that are threaded all the way down. The one’s I’ve seen aren’t suitable for use on a Porsche, not to mention on the track. Tread carefully.

Best,
Grady

[Chuck Moreland]

They are likely hardened. So to cut threads would mean to first anneal, cut, then harden. Then I'm left with cut threads and potential stress risers.

How about an extended lug-nut? I could fab a set by welding two together.

Anyone know if steel lug nuts are hardened?

[Grady Clay]

Chuck,

Never ever try and extend the threads by cutting. That is a disaster waiting to happen. The Factory studs and OEM are forged and then the threads rolled on the forging. I don’t think they are hardened, just very fine steel. These are very high quality parts – for a good reason.


No, the lug nuts aren’t hardened.

Yes, I have done just what you are proposing. I used them on the trailer wheels only. If you were to use these on track or street (not recommended), I would only use the ’74 and later centering wheels & hubs.

Best,
Grady

[Oldporsche]

Try to file it with a single cut mill file. You will find out if it's hardened.

David Duffield

[914/6]

Stupid question, do you really need 100 ? , get 72 still have the racer look and can use some spacers if need be.

[Joe Bob]

Use 1/8 inch spacers......

[J P Stein]

If you're worried about stress, use a UNJF thread.

[Zeke]

I remember this subject from quite a while back. Maybe some diligent searching.......there was an answer. What ever happened to Troutman?

[briankeithsmith]

Performance Products sells them.

[Chuck Moreland]

Brian, do you know the performance parts to be fully threaded? I suspect they are the same part our host sells.

Grady, I won't be cutting these studs. What is your concern about the extended lug nuts?

I would use the extended lug nuts only on my street wheels. My race wheels need spacers and therefor standard lug nuts.

But this may change as new wheels are acquired/ put into use.

Mike, I don't have room for spacers with my street wheels. I would need about 1/2 inch to prevent bottoming.

[CarreraCab]

Hi Chuck,
Quite a few years ago, I bought a set of 100's from Alan Johnson racing for a 916-6, don't know if they still carry them ? They were what you are after, threaded all the way down to the knurled portion. Milt mentioned Troutman, but dunno if they are still around, good luck,
Doug

[Lukesportsman]

I don't see a single problem welding two lugs together though if its appearance you're after. How hard would lugs have to be if your double engaging the threads and the fact that many of us run aluminum lugs on the street anyways.

[Chuck Moreland]

Appearance is not a concern. I'll check with AJ.

Also found these:



extra tall lug nuts. If they're threaded full depth, I could cut away the first 1/2 inch of threads, and open up the back side to allow the studs to pass.

But, I'd rather do it with steel.

[efhughes3]

Chuck, where did you find the extended nuts?

[Chuck Moreland]

Our host sells them.

[briankeithsmith]

Chuck:

I am not sure if they are fully threaded. I never looked at them. Just handed them over to my mechanic when he was doing a rear wheel bearing job on my 930 trailing arms.

Brian

[Jack Olsen]

Chuck, TRE sourced mine. I'd check with Dave to see what/whose they are.