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Discussion Starter #1
Hello,

I am trying to find a good fitting closed-cap lug nut for 3" wheel studs, but am stuck with a proper nut length. I've found several posts mentioning using 1" lug nuts but assume those to open-style nuts.

Thanks, Eric
 

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The Parts Guy
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That will depend heavily on the hub flange thickness of the wheels you intend to run. What length lugnuts are you looking for?
 

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Discussion Starter #3
Good call...the wheels are SCP Cobra R's. I was just assuming the hub flange thickness didn't vary so much between our wheel options that it would change my options.

I'd like to think I'll be fine with 1.9" closed end lug nuts.
 

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50 years of Mercury Cougar 1967/2017
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Unless you are using a racing type wheel, (I have Weld Drag Lite 90's on my cougar)
the wheel stud has to extend out from the lugnut equal the diameter of the stud.
eg. 1/2" stud, stick out 1/2".
 

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Discussion Starter #5
Thanks for the info. I just now realized I forgot a crucial piece of info; I'm also running quarter-inch spacers for clearance. I would prefer studs slightly shorter than 3", but that would create another issue of having to change the hub stud bore to accommodate a different than stock knurl diameter, as their are no studs I have yet to find in stock knurl diameters other than in 3" lengths.

I know the stock stud lengths, so I may just measure from the outside hub flange of the wheel to the tip of the stud and subtract that length from the overall length to get a ball park on total thickness of hub, spacer, rotor, and wheel. I'll try to remember to report back for future reference.
 

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Unless you are using a racing type wheel, (I have Weld Drag Lite 90's on my cougar)
the wheel stud has to extend out from the lugnut equal the diameter of the stud.
eg. 1/2" stud, stick out 1/2".
You're thinking about "thread engagement". So long as you have 1/2" of thread engagement (at minimum) inside of the lugnut on a 1/2" stud, it will be fine. It does not have to stick out beyond the lugnut's open end so long as the above criteria has been met.
 

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You're thinking about "thread engagement". So long as you have 1/2" of thread engagement (at minimum) inside of the lugnut on a 1/2" stud, it will be fine. It does not have to stick out beyond the lugnut's open end so long as the above criteria has been met.
If you run drag tires at the track they need to see the stud protruding through the lug or you won't pass tech.
 

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Discussion Starter #8
After taking some rough measurements, I am losing about 1.70" to 1.75" (about 45mm) of the 51.5mm front studs. Needless to say I'm in desperate need of the longer studs, and the 3" studs will work just fine with 1.9" closed end lug nuts. Any track time will of course have open ended nuts.
 

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After taking some rough measurements, I am losing about 1.70" to 1.75" (about 45mm) of the 51.5mm front studs. Needless to say I'm in desperate need of the longer studs, and the 3" studs will work just fine with 1.9" closed end lug nuts. Any track time will of course have open ended nuts.
You need to put-up some pictures of WTF you're trying to do. First it was about "closed-cap lug nut for 3" wheel studs". Now it is about "desperate need of the longer studs, and the 3" studs".
Something sounds odd, and it may just be me.! :D

(También hablo español Primo, but this is America.) (oder scheiss Deutsch, wenn Du willst). (PM me in this case.)
 

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Discussion Starter #11
Ha, sorry for any confusion. Everything reads clearly to me, so I'm not sure I can help with any potential ambiguity. I am in need of longer wheel studs, but did not want to use open-ended lug nuts except on the track, so was asking anyone for a recommendation on an appropriate length lug nut for a 3" wheel stud with my given specs. I backed up the supposed need for longer studs by realizing I could measure my current setup with the stock wheel studs, that's what the last post concerns. Longer studs = 3" wheel studs.

At the time of my first post I for some reason didn't think to measure the stock front stud with everything on (rotor, spacer, wheel). Many people use the SCP 17x9 Cobra R's, and apparently sometimes you'll need a spacer to clear the spindle and sometimes you don't, and my set happen to be of the needing a spacer variety with suspension setup...so I was hoping someone else had info on the issue already.
 

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Ha, sorry for any confusion. Everything reads clearly to me, so I'm not sure I can help with any potential ambiguity. I am in need of longer wheel studs, but did not want to use open-ended lug nuts except on the track, so was asking anyone for a recommendation on an appropriate length lug nut for a 3" wheel stud with my given specs. I backed up the supposed need for longer studs by realizing I could measure my current setup with the stock wheel studs, that's what the last post concerns. Longer studs = 3" wheel studs.

At the time of my first post I for some reason didn't think to measure the stock front stud with everything on (rotor, spacer, wheel). Many people use the SCP 17x9 Cobra R's, and apparently sometimes you'll need a spacer to clear the spindle and sometimes you don't, and my set happen to be of the needing a spacer variety with suspension setup...so I was hoping someone else had info on the issue already.
Sorry Buddy' still can't recall anyone ever needing longer studs for any wheels that are available for our cars.
Question: Do you have your new wheels already?
IIRC our studs are plenty long and a 5mm spacer shouldn't affect anything.
If you have your wheels already, please try to mount them and tell us how much thread you're catching. W/O the actually wheels on hand, and a try fit, any info given here could be wrong.
Do you have the wheels?
 

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Discussion Starter #13
Just noticed the last response. Currently, I am running 3" studs front and rear with 1/4" spacer and open-end 1" lug nuts with no problems. For reference, though, the 2" closed lug nuts (I believe they were Gorilla) seemed to be long enough as well.
 
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