Long wheel studs, 8 3/4 w/ drum brakes

[padam]

The difference is .007", does that seem big to you?
The hole has to be smaller than the stem so that the interference holds it in place. Usually the tops of the knurls will crush down and cut into the hole somewhat on installation, so that may be the difference in measurements.
A new stud should measure bigger than a used stud.
On a non-knurled pin .001" per 1.000 diameter is a lot of interferance.

 

[33 IMP]

And is there really a big difference between 673 and 680?

It could EASILY be the difference between pulling the studs in, and NOT pulling the studs in, and/or stripping the threads.
In my opinion, the best way would be to knock out a stud and measure the hole to see exactly what size you need.

 

[33 IMP]

@chrger1967 why do you need longer studs? Race car legality, or just cause of thicker mag wheel centers with conical nuts?

 

[RemCharger]

Mr gasket 4311 just did this in 2018..

Mr. Gasket 4311 Mr. Gasket Competition Wheel Studs | Summit Racing
View attachment 801620

I am in the same boat looking for longer wheel studs. I was thinking 2 3/4 could be too long. Did those studs cause you any problems putting them in or any length problems?

The 4311 fit in perfect and are designed for this application. And the up side is you can cut them to your own custom length

 

[chrger1967]

The difference is .007", does that seem big to you?
The hole has to be smaller than the stem so that the interference holds it in place. Usually the tops of the knurls will crush down and cut into the hole somewhat on installation, so that may be the difference in measurements.
A new stud should measure bigger than a used stud.
On a non-knurled pin .001" per 1.000 diameter is a lot of interferance.

I found a place that has them at a fair price. I thing I will try them.

@chrger1967 why do you need longer studs? Race car legality, or just cause of thicker mag wheel centers with conical nuts?

the prior owner had upgraded to disc brakes and there is very little thread with wheels on. The stud is even with the nut. I would feel better if there are a few more threads sticking out. At least a ¼”.

 

[chrger1967]

I have a Mopar set. I believe the knurl is .680. I can check that later.

View attachment 1857266

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I found these, but i was wondering how long they are.

 

[threewood]

Well, I should have posted what I found when I found it lol. gkent sent me an i.m. saying he has the studs I need and I was very confused lol.

Here is what I used...610-449 dark ones on the front disc's, 610-446 chrome ones on rear drums.

 

[71Beeper]

I used these on my set-up.

 

[chrger1967]

Well, I should have posted what I found when I found it lol. gkent sent me an i.m. saying he has the studs I need and I was very confused lol.

Here is what I used...610-449 dark ones on the front disc's, 610-446 chrome ones on rear drums.View attachment 1857850
View attachment 1857936
View attachment 1857851View attachment 1857852View attachment 1857855

I actually reached out to Dr Diff, and he gave me 610-287. They are 1/4 inch longer then the original ones, and that's what I wanted.