new rims but is this a problem, please help????

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hey all,

i just got my 19s in and i am not home with my car but my dad said that the lug studs seem a lot smaller than the holes in the wheels. they fit and all, but he said they dont seem right? could there be a problem or what should i do. i cant see it for myself because i am a few states away but what could this be, or is he just worried about them not fitting? shouldnt they just lock down with the lug nuts, and btw we dont have lugs on yet hes just holding the rim on the studs with no tires either. well let me know what you guys think. and ill try to get more info from him later.....thanx

That's fine. The tapered lugnuts will center the stud in the tapered hole in the wheel.

ok i hope so, its just hard being that im not near the car and cant see what he sees. thanx tho

Make sure hub centric rings get installed.

Originally posted by TourDeForce:
Make sure hub centric rings get installed.

yes that and make sure ur rims and tires are properly balanced with full allignment..I just did all that on mine and man o man the car is absoloutly smooth on the highway

Originally posted by Goonz SVT:

Originally posted by TourDeForce:
Make sure hub centric rings get installed.

yes that and make sure ur rims and tires are properly balanced with full allignment..I just did all that on mine and man o man the car is absoloutly smooth on the highway

And make sure you take the rotor retaining clips off the lugs.

well what are hubcentric rings?

do i need them?

should i have them from old wheels or where do i get them?

thanx

There's a recent thread on this. A hubcentric ring is a plastic or metal ring that fits the hub to the hole in the wheel. They are theoretically unecessary, but make mounting more foolproof, and take the load off the studs if something doesn't work like it's supposed to.

The hub carries the weight of the car. The lugs are designed to hold the wheel to the hub, but not to support the weight of the car. That is why so many people end up popping lugs off and losing wheels in the street.

Many aftermarket wheels will have a hub opening that is large enough for the biggest application of the wheel. The consumer (you) driving a car with a slightly smaller hub needs to fill that gap with a hubcentric ring so the hub holds the weight of the car - not the lugs.

I don't really know where to find them as I've always purchased wheels that are a direct fit for my cars.

Originally posted by TourDeForce:
The hub carries the weight of the car.

No! The friction between the rotor hat and the wheel face hold the weight. Under extreme conditions, especially if the metal surfaces in contact are greasy/dirty/rusted, there is a small amount of movement. This causes fretting of the surfaces, and fatigue wear on the lugs. This is one reason to use HC rings: they help reduce this motion. The other is that they make it much easier to mount the wheel.

Also, think about this: when I decelerate at nearly 1G, I'm transmitting a huge amount of force RADIALLY through the wheel/hub/hat interface. It's sure not going through the hub, since it's a radial force, and it can't be going through the lugs or they'd break: it's being borne by the friction force that also holds the weight of the car.

I sure would like to know the source of your information.

http://www.idsfa.net/miata/lugnuts/page1.jpg
http://www.idsfa.net/miata/lugnuts/page2.jpg

There are many cars that run around with no contact betwen the hubs and wheels. Miata guys seem to have no issues at all. I assure you, wheel studs are NOT a shear-loaded member! Stazi says so, and most people here believe him, since he designs this stuff for a living. Check out the new and old HC rings threads for more info. There's one thing Stazi, Weargle and I all agree on, and have from the beginning: once the wheels are on, the studs bear no shear loads, whether rings are there or not!

Originally posted by Pete 6.0:

And make sure you take the rotor retaining clips off the lugs.

what is that?

well where do they go and how do i get them?

do they fit the car or my wheels?

would these work? if so where do i get them?

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=wheels&Number=1213430&page=0&view=collapsed&sb=5&o=7&fpart=2#Post1219264

Originally posted by LukeDuke:
would these work? if so where do i get them?

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=wheels&Number=1213430&page=0&view=collapsed&sb=5&o=7&fpart=2#Post1219264

Right Here!

So let me get this straight; you're taking it as gospel even though it might as well be scribbling on a coctail napkin.

Frankly, I'd like to know from a manufacturer like Ford, GM, Mazda, or any of the others, why they choose to have an extended hub that projects into a precisely sized hole in the wheel center on pretty much ALL of their vehicles. Why do they have such hub centers of differing sizes on various vehicles? Seems to me it would make sense to have them all the same size so you could interchange wheels freely and possibly save on some manufacturing costs.

Additionally, how much force do you suppose is exerted onto a wheel when a car rolls through a pot hole at 45 mph? Seems to me that forces approaching the 10x margin of safety are not outside the rhelm of posibility, especially if the car is going around a turn 'cause then you add the stresses of that lateral load on a relatively soft alloy wheel. Nasty stuff...

Maybe I'll do a little research of my own...

Wikipedia:

Centerbore
The centerbore of a wheel is the size of the hole in the back of the wheel that centers it over the mounting hub of the car. Factory wheels have a centerbore that matches exactly with the hub to reduce vibration by keeping the wheel centered. Wheels with the correct centerbore to the car they will be mounted on are known as hubcentric. Hubcentric wheels take the stress off the lug nuts, reducing the job of the lug nuts to holding the wheel to the car. Wheels that are not hubcentric are known as lugcentric, as the job of centering is done by the lug nuts assuming they are properly torqued down. Centerbore on aftermarket wheels must be greater than or equal to that of the car or the wheel will not physically mount to the car. Many aftermarket wheels come with hubcentric rings that lock into the back of the wheel to center it like a factory wheel, usually made of plastic.

Edit:
Well, seems you're right & I'm wrong.

However, I would never go without the rings for the reason described in this link.

Originally posted by Auto-X Fil:

Originally posted by TourDeForce:
The hub carries the weight of the car.

No! The friction between the rotor hat and the wheel face hold the weight.

Y'all need to pass that tish that you're smoking.

You have an opinion to share weargle?