What will cause a wheel stud to do this?

Just install new rims and tires on my 2016 Dodge Ram and had to buy new lug nuts as well. They didn't feel quite right when they went on but not bad enough that I thought they were cross threaded. I took the wheels offs a few days later and he lug nuts came off super hard. Th ends of the studs now look like crap, and the lug nuts look like junk. What would cause this? I went wit 9/16 lugs nuts as that's it shows after looking them up.

The other side didn't look as bad. I'm checked with a tire iron a day after installing and I was able to a quarter turn on a couple.

closed end lug nuts not tapped deep enough?

Were the lug nuts stainless steel? Looks like thread galling? I put anti-seiz on the studs.

I'm with 6bblgt, incorrect lug nuts not threaded deep enough.

Don't drive the truck, your wheels are loose. Examination of the lug holes in the wheels is needed.

Open ended lugs, trimmed studs are options for fixing.

Thanks for info guys, the lugs nuts were inclosed long gorilla brand ones. I'll go and get some open ended ones and trim off the bad part like you said

Just realized what I did wrong, got looking on eBay and it looks likes 2016 ram takes 14 1.5 lug nuts. Man I hope I just didn't ruin all my threads

9/16 must of been for an older Ram.

That would do it.

All the newer Mopars have Metric thread wheel studs.

Yep, they changed the lugs in 2012 from 9/16-18 to 14 mm. I found that out when I changed the wheels on my 2015 this year. Had to buy new lug nuts and got them off eBay for $22 for 32 nuts, darn cheap!

i can't recommend this, as then your studs may be too short to use with your new wheels. i would replace all the studs. if you look close, your pic shows thread damage below the really buggered up portion [the shiny three or so threads]. these threads are deformed, and i wouldn't trust 'em. i know that may not be what you would want to hear, but 20 studs would be WAY cheaper than a crashed truck. just my opinion, and repairing threads in many things over 50+ years.

Yes I agree, all 20 studs need to be replaced. At least it was not 24 or more lugs.

So sorry and not trying to be negative but once you force the wrong sizes together it destroys both fasteners. So sorry it happened.

Please replace those studs and get new lug nuts and and chock it up as a learning experience.

Relatively cheap learning experience!

I really hate to break with the pack but I wouldn't go out and start replacing the studs just yet. When I look at the pictures I see 75% of the stud untouched. I'd get a metric die and clean the threads up. Not a thread chaser, a die. Then I'd do some careful measurements to see how much of the studs would be engaged by the nuts. If the nuts engage at least two thirds of the stud, I'd just drive it. Now if you have driven the truck with the incorrect nuts, then I'm with the pack. I'm sure the studs have been flexed and that's never good.

Have to agree with not replacing the studs but disagree with 6pacBee on the use of a threading die. I would use a thread chaser. A thread chaser will straighten the damaged threads, a die will cut new threads where they are damaged reducing the strength in the damaged area. Just get the proper lug nuts after you fix the threads.

Sorry this is wrong.
I see at least 1/2 of the threads on the front 3 studs are messed up. The studs are cheap, replace all of them, and all of the lugs on each wheel you tried to force the incorrect lug nuts onto. Gene

Looks like I'll need to take axles out to replace the back studs.
I'll change them out to be safe. I really wish they would put the size on the factory lug nuts. I did notice last night that there was a M on the end of the nut.

This is what I see from the picture. On the closest stud there are about four threads that are destroyed. Then there are about 6 threads that look to have some damage. The remainder (14-16) look pristine. How many threads do you need to achieve rated tensile loading on the stud? I would guess a little over half an inch. I did compare a 9/16 NF thread to a 14 1.5 metric. 0.5625 major diameter and 18 TPI versus 0.5512 major diameter and 17 TPI (based on 1.5 mm/thread). I can see how the two worked, kind of. This is just my opinion.

Wheel studs and lug nuts are nothing compared to what could have happened to a 3 ton vehicle, going highway speeds with the wheels dismembering themselves.

I would replace them also, if for no other reason, peace of mind. I'm not sure pulling the axle is necessary though. Most vehicles have a hole or slot somewhere on the backside that'll allow room to push out/pull in the studs. Having said that, I've never pulled an axle on one of those...maybe it's the easiest route.

If you do not know the answer to that question you shouldn't comment.

The minimum engagement is the same as the diameter. If you have a 1/2" stud you need at least 1/2" engagement.

Looks to me like EVERY thread the wrong lug nuts engaged are damaged to some extent. The undamaged threads were not engaged by the lug nuts.

Questions is, how did they ALL get damaged like that.

Impact wrench.

Which is exactly why I do not use them in install lug nuts.

Nothing like being lectured by someone who apparently doesn't know what a rhetorical question is.

When safety is on the line rhetorical questions are stupid.

As is the suggestion to clean them up and run them.

Any more comments?

Get a air chisel and knock them outI had the fun opportunity to have wheel come off but wheel got caught in my wheel well right on my driveway Studs broke off clean Told that it was too much power to 7/16 studs. I think that they simply worked loose and broke from strain

Anyone who doesn't appreciate the value of rhetorical questions is an idiot. What is it like to know everything about anything? I'll bet you feel real special waking up in the morning being the last word on anything. You got any more comments? I mean useful ones other than this garbage you keep posting? There's such a thing as civility, apparently yo' momma didn't teach you that. It's people like you who make me wonder after all these years why I'm still on this forum. I'm done with you.

clean em up and run em!