Somewhere recently I read something about "hub centric" wheel attachments on some cars. My car seems to use the hub centric scheme.

But I don't see much about it here. A search turns up only 6 mentions over the years. I found questions about it asked years ago that were apparently never answered.

The thing is, I've seen several mentions of using wheels from other vehicles, and these seem to take into account ONLY the bolt circle.

It it officially considered that daily drivers have no need for hub centric matched wheels? Is this how people seem to freely use, for instance, Ford wheels on A-bodies? Is this maybe why Hollander doesn't even talk about it?

Hub-centric wheels are a recent/late-model phenomenon; you don't need to worry about it on your A-body.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

What do I call the squeeze fit on my '65 Valiant?

Thanks

Just "regular", I guess...but it won't come when you call it!

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I guess I'm getting confused here. In every place I've read about it on the internet (a dozen or so) a close hub-to-wheel fit is the very definition of hub centric. What's wrong with this picture? I dont' get it. If Chrysler centered their wheels with a tight fit on the hub why is that now unimportant? How does this not enter into the wheel swapping game?

Thanks

Yes...and?
They didn't. The wheels on your car are lug-centric, and not hub-centric.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Darn! I'm going to have to lay off the hallucinogens! The other morning I dreamed I took all the lug nuts off one wheel and it didn't even move. Wheeee I even dreamed there was a ring around the hub more than a quarter inch wide and a close fitting, matching ring in the wheel. I think I'll be a dope fiend when I grow up

Naw, y'just have to lay off the snarky sarcasm when people give you accurate technical information in response to your questions, is all.

( of course.)

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Awwww, come on Dan. Based on what I've read I'm trying to figure out the underlying issues here - the engineering principles underlying what people are talking about. Or more correctly not talking about. And you want to button it up with a pronouncement? Like someone had challenged you to a dual or something?

I asked some questions based on what appeared to me to be the accepted definition of "hub-centric." You brushed it aside. OK, you tell me what is actually going on? Tell me the correct definition of hub-centric and why it matters, so I can try to grasp the "rubber hits the road" difference between what I'm reading on the internet and what you are declaring.

If we're talking apples and oranges nothing will ever be clear. As it is, I have no more idea how to make decisions about wheel fit than the guys whose questions about it have been unanswered in the past. Your declaration about Chrysler wheels, my wheels, is probably absolutely incontrovertable for some reason, It just doesn't tell me anything about wheels fitting cars properly - about buying the right thing if I stumble across what looks like a good deal but may not be.

Thanks

( of course.)

The engineers designing such things have to decide how the pieces - in this case rims - will be located and held on the hub. Located as in having a repeatable, consistent position in relation to other parts. Held as in clamped. Hub-centric systems then require that the wheel register and the hub have a nice, close fit, and that everything be centered. When you're dealing with a mix of cast, stamped, and machined parts designed in the late 50's, that can be a problem.
Remember that, ideally, threaded fasteners are loaded in tension, and not subject to shear. Pins, dowels, or in this case, the hub do the locating, at least in that plane. The lugs still may see some shear in rotation.
Using the lugs to locate as well as clamp does work well enough for most situations, but it's not as elegant a solution. Ever try to hang a rim on a VW bug, fumbling with lug bolts instead of nuts? Our Mopar rims are pretty close, and the conical nuts do a good job of centering when properly installed and torqued.
I'm not sure what constraints the Chrysler engineers were under at the time, but I suspect that there were questions of costs/benefits in maintaining the tight tolerances necessary for true hub-centricity in large production runs.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

So it would be a good idea to get centering rings if you were buying wheels with obviously larger hub registers? Ah, so the use of the official term hub-centric is dependent on specific tolerances? It makes me wonder if there might be such a thing as "true" lug-centric.

But going back to the top, whether one says "hub-centered" or "true" hub-centric, It's best not to just hang the wheels out there on some bolts, rather you really should peg them to the hub one way or another.

Thanks

I don't know what you would consider "official". This is not a legal matter.
As I understand it, the engineers designated it lug-centric. It's a reference for manufacture. Some of the cars have a pretty tight hub/rim fit and some do not. They can all be within specified tolerances.
No. It's a reference system. The engineers then set tolerances on various measurements from the reference (datum) points.
It wouldn't hurt, and would be a good idea for high performance driving. Make sure the outer diameter of the hub is concentric with the bearing races, while you're at it, if you want to be thorough. And check the center register of the rims vs the bead seating surfaces.
It's not really necessary for normal driving.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

Ross: On a 9" drum equipped 65 a body there is nothing close tolerance enough about the hubs to be even remotely "hub cenric" Its hard enough to get the drums to run true to the hub.

My GF recently bought new 16" rims for her AWD Turbo Talon....the tire shop ( a gem of a business) recommended hubcentric rings ($19) to compliment the new rims and Z rated tires. At 125 MPH there is no vibration .......

My disc brake equipped 65 Valaint with V rated tires gets no rings....Why? BECAUSE THE HUBS ARE NOT MADE USING TOLERANCES THAT ARE CLOSE ENOUGH TO USE TO LOCATE THE RIMS.

These cars are NOT hub centric ....they are lug centric no matter how you play with the words. Try not to confuse yourself and other people by redefining simple concepts from the 60s with Asian performance car concepts from the 21st century.

Some day ....when you have custom hubs with 13" disc brakes ....22" wheels with z rated tires we can talk "hubcentric"....in the mean time think disc brakes and BBP 14 or 15" wheels with a low profile tire.

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Yeah....Im the one who destroyed this rare, vintage automobile.....

Thanks. Explanations are more useful than declarations.

Thanks. Explanations are better than declarations.