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Discussion Starter #1
PursuitGT said:
Hub centric rings are used so the wheels are located directly off of the centre flange of the brake drum or rotor. This is done to insure that the outer beads of the wheel are concentric with the wheel bearings. The result is a much truer, better balanced tire/wheel assembly. This is very important with modern high tech suspension systems.
You got me thinking about this now - I am worried that the place I bought mine off didn't do this with my rims - would you be able to visually tell if this was done?
 

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unless there is more than one kind, you would have to take the wheels off the car to see if the plastic ring is in behind the rim. My last car didn't have them with 17" rims on my wave, but the dealer put them on in an attempt to fix a problem, which they made no difference on.. in my case anyways.
 

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OK - I just was curious if I might be able to see them without taking the rim off. I will just call my rim guy and ask.
 

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What he's holding in his hand is a hubcentric ring. It goes in the middle of the rim so no you couldnt see it with the wheel on.
 

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Yeah, well I finally got the numbers that I needed, mind you even the dealership didn't have the info on computer, but instead they were nice enough to get me a brand new hub assembly, and I got the measurments needed to cross reference it on ebay

HUBCENTRIC HUB CENTRIC RING RINGS WHEEL RIM 54.10 x73mm

I guess some cars like Scion, Escorts, and a few others take this size, but it doesn't really have it listed for 05+ G5/Cobalt (4 lug). I hope this info will be helpful to anybody else going with custom wheels.
 

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See that's the thing, the rings will differ between rims and cars. to figure out what size ring you need to know the hub size(which you have) and then you need to know the center bore on the rim because all the ring is doing is filling the space between the rim and the hub.

Inter diameter of the ring = measure the hub
Outer diameter of the ring = measure the center bore of the rim.
 

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Well that is the size und3rpr3ssur3 listed for his 4-lug. You could just measure the hub to be certain.
 

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If I remember some time today, I'll go into the shed and see what my summer tires have for rings...
 
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