M14 wheels on M12 studs

[Dihudaxia]

Have a quick question, am looking at purchasing a set of wheels, but they only have them with M14 size holes.

Our cars have M12 studs, will it be safe if I use the larger bolt holes with our M12 hubs?

I have this image on the wheels rattling against the smaller studs. Hahhahaa

[SUBAWHO]

It will not be safe. No question about it.

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[86kahl]

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[mav1178]

You can run it as long as the wheels allow for large enough lug nuts to be used. Ideally 19mm or 21mm.

If you want to be safe you can also run hub center rings as a precaution.

-alex

[ryoma]

even though you probably CAN do it, it's best if you don't. just because you can do something doesn't mean it's always a good idea.

[Dihudaxia]

Thanks for the advice.

Seems like there is a conflicting POV here.
Lemme read up on what mav1178 had mentioned.

[adamg]

You need hubcentric rings if the wheels are not hubcentric to your car already. other than that you will have no problems

[86kahl]

Why. Why. Why.
Just get wheels that fit m12 or bite the bullet and switch to m14 studs. It's gonna be a safety issue since the play between the wheel and hub could allow the lug nuts to loosen up. It's not a case of IF the lug nuts will fit, it's HOW long will they stay torqued down while driving. And a hub centric ring won't prevent the wheel from getting "indexed" from using the wrong size.

Just do it once and do it right. Safety isn't something you wanna experiment with.


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[mav1178]

Again: you can run M14 wheels if you have a proper lug nut to seat the wheel.

M12 studs also have play when you mount the wheels.

There really isn't a safety issue as long as you use the right lug nuts, I helped customers use M14 wheels on M12 studs for many years.

-alex

[86kahl]

Originally Posted by mav1178

Again: you can run M14 wheels if you have a proper lug nut to seat the wheel.

M12 studs also have play when you mount the wheels.

There really isn't a safety issue as long as you use the right lug nuts, I helped customers use M14 wheels on M12 studs for many years.

-alex

I feel bad for the customers you've "helped"


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[adamg]

Originally Posted by 86kahl

It's not a case of IF the lug nuts will fit, it's HOW long will they stay torqued down while driving. And a hub centric ring won't prevent the wheel from getting "indexed" from using the wrong size.

Do you have personal experience or are you just assuming

[86kahl]

Originally Posted by adamg

Do you have personal experience or are you just assuming

Professional experience.

Personally I've never done something that foolish. But I've seen the results of someone doing this and it wasn't pretty. Wheel
snapped off three of the five studs going down the 91.

To me this IS a safety issue. Just because you can use an impact to over torque and compensate for the difference is not the same as following the manufacture torque. Stay safe and use the proper wheels with the right stud size torqued to spec.




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[mav1178]

Originally Posted by 86kahl

To me this IS a safety issue. Just because you can use an impact to over torque and compensate for the difference is not the same as following the manufacture torque. Stay safe and use the proper wheels with the right stud size torqued to spec.

Nowhere did I say anything about using impact or anything else.

Again: as long as you have the proper lug nuts to be able to have enough area on the lug seat of a wheel, it is not a safety issue.

What makes you think using a wheel with 14mm lug holes is a safety issue on a car with 12mm studs? Let's assume large-enough lug nuts were used and it is torqued down to manufacturer's spec without an impact gun.

-alex

[86kahl]

Originally Posted by mav1178

Nowhere did I say anything about using impact or anything else.



Again: as long as you have the proper lug nuts to be able to have enough area on the lug seat of a wheel, it is not a safety issue.



What makes you think using a wheel with 14mm lug holes is a safety issue on a car with 12mm studs? Let's assume large-enough lug nuts were used and it is torqued down to manufacturer's spec without an impact gun.



-alex

Sorry I didn't mean you personally just as general statement.

On the contrary it is a safety issue, it's still using wheels that requires a larger stud....

The scenario you described above is exactly what happened to the customer I was referring to. He had a custom wheel shop mount M14 wheels on M12 studs with 19mm lugs and they impacted them down, everything's fine for two months till he brings it to another shop(where I was working) who had no idea he had incorrect sized lugs, we used a torque wrench to tighten them (89ftlbs) it just wasn't enough to hold them down properly and it ended up snapping studs. Needed a whole new hub assembly that could have been prevented.



Seriously why play around with this? Just get the right size wheels or change your studs. why chance it? Manufactures have spent a lot of R&D money so I'd trust them over what u read on the Internet and that's including my post. Honestly just be safe and don't cheapen out where it matters.


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