Determining Stud Length

[galaxy]

If you want/need to run spacers and want to go with longer studs and a slip on spacer, what’s your guys’ technique for determining how long of a new stud you need? I’d guess just add length equal to the thickness of the spacer, but not completely sure I’m not missing something. Wouldn’t the wheel come into play also? And making sure you have enough protrusion to have enough lugnut engagement. Thanks guys.

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[NightmareMoon]

Wheel thickness matters, for sure, but its close to one to one

for a 1” spacer, 1” longer studs are ideal, and may disappear under some closed ended lug nuts. You can only go about 5mm (0.2”) thicker in the spacer than your studs are longer before you tun into issues with not having enough thread engagement so if you’re running an odd size, better to go longer on the stud and run an open ended lug nut.

 

[galaxy]

Thanks man. I have traditional bolt on 25mm spacers, but just asking from the angle of wanting spacers thicker than 25mm. I’d go the longer stud and slip on spacer route.

 

[ModularKid21]

I just put some bearings with 3” studs on my car. My plan is to run a 20mm, maybe a 25mm depending. I could’ve gone with longer studs but I just used the 1:1 method. I have the stock wheels on for winter (with no spacers) and there’s a ton of thread left

 

[galaxy]

I just put some bearings with 3” studs on my car. My plan is to run a 20mm, maybe a 25mm depending. I could’ve gone with longer studs but I just used the 1:1 method. I have the stock wheels on for winter (with no spacers) and there’s a ton of thread left

What's the 1:1 method? Is that reference to increasing stud length equal to the thickness of the spacer? If you run a 25mm spacer with these 3" studs, are you still going to be forced to run an open lugnut?

 

[kent0464]

If you want/need to run spacers and want to go with longer studs and a slip on spacer, what’s your guys’ technique for determining how long of a new stud you need? I’d guess just add length equal to the thickness of the spacer, but not completely sure I’m not missing something. Wouldn’t the wheel come into play also? And making sure you have enough protrusion to have enough lugnut engagement. Thanks guys.

Pretty much every were I’ve read says a minimum of 6 full threads for proper lug-nut engagement.
I’ve been using 1 1/2” billet aluminum bolt on spacers in the front for the past 2000 miles with zero issues, with my after market wheels, to have a convenient 10” wide square set up, just make sure you install the spacers correctly @ 150 ft lbs with red loctite.

 

[NightmareMoon]

What's the 1:1 method? Is that reference to increasing stud length equal to the thickness of the spacer? If you run a 25mm spacer with these 3" studs, are you still going to be forced to run an open lugnut?

No you shouldn't have to run open lugs with 1" spacers and the ARP 3.435” studs (100-7733). I ended up running open lugs anyway (stock width Ford Performance open ended lugs), but it shouldn't be required as long as the spacer is installed.

Pretty much every were I’ve read says a minimum of 6 full threads for proper lug-nut engagement.
I’ve been using 1 1/2” billet aluminum bolt on spacers in the front for the past 2000 miles with zero issues, with my after market wheels, to have a convenient 10” wide square set up, just make sure you install the spacers correctly @ 150 ft lbs with red loctite.

OP isn't talking about bolt on spacers, he specifically mentioned longer studs and slip on spacers.

 

[ModularKid21]

I only went with the open end lug nuts because the factory lug nuts deform. I’m always taking the wheels on/off my car so it didn’t take long for them to become damaged. And I have a badass impact gun that I like to use so that didn’t help the longevity of them either

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