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      02-10-2009, 12:20 PM   #1
ILLCOMM
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Centering Rings

I am thinking about picking up a set of O.Z. wheels and I was told that they require centering rings. I assume that centering rings, just like spacers, introduce the risk of vibration and misalignment in how the wheel is mated to the hub. A part of me feels that if I am buying wheels I shouldn't have to be dealing with centering rings and spacers (the front offset requires a spacer).

Thoughts?
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      02-10-2009, 12:57 PM   #2
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Originally Posted by ILLCOMM View Post
I am thinking about picking up a set of O.Z. wheels and I was told that they require centering rings. I assume that centering rings, just like spacers, introduce the risk of vibration and misalignment in how the wheel is mated to the hub. A part of me feels that if I am buying wheels I shouldn't have to be dealing with centering rings and spacers (the front offset requires a spacer).

Thoughts?
hub centric rings compensate for differences in the centerbore of a rim. i personally would find a rim that doesn't require a hub centric rim (M3 has CB of either 72 or 72.5, I can't remember), but wouldn't mind using spacers up to about 15mm depending on the application.
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      02-10-2009, 02:42 PM   #3
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Most European tuner wheel manufactures use a mounting kit system. These kits are essentially hubcentric spacers/centering rings with bolts that have the proper length for that spacer.

Wheels mated with the proper centering ring (72.6) or hubcentric spacers and bolts with give you problem free operation.

Problem is when you go with a generic application wheel (dual drill). This is when a wheel manufacture makes the same offset for 2 different cars and has the face drilled with both bolt patterns (10 holes). They also make the center bore bigger to accommodate either application. IMO this type of wheel should never be put on a BMW, any BMW.

Are you sure these OZ wheels are not hubcenteric (72.6) for BMW? Offset is one thing, but not hubcentric. hmmmm
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      02-10-2009, 04:06 PM   #4
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The O.Z. Ultraleggera HLT's come with the following info on e92 M3 applications:

Quote:
The following wheel-specific hardware will be included with your order at no additional charge.

* (20) Required lugbolt for vehicle
* (4) Required centering ring
* (2) Required wheel spacer
The spacers are required for the front as they come in a 34mm offset (vs stock 29mm).

I was pretty much decided on these wheels until I learned that I would need spacers AND centering rings. Sounds like a lot of room for error.
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      02-11-2009, 12:22 AM   #5
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Quote:
Originally Posted by ILLCOMM View Post
The O.Z. Ultraleggera HLT's come with the following info on e92 M3 applications:



The spacers are required for the front as they come in a 34mm offset (vs stock 29mm).

I was pretty much decided on these wheels until I learned that I would need spacers AND centering rings. Sounds like a lot of room for error.
Just to share my experience with spacers. I lived in upstate NY and had spacers on my rears for about 4 months (9-12). When I tried to take the spacers off, both were seized on the hub due to corrosion... really painful experience trying to take them off.

Of course, if cared for properly in dryer weather, this hopefully won't happen. Though I see that you live in Seattle, which has snow. Anyway, it can be done, just with some extra effort. GL!
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      02-11-2009, 01:26 AM   #6
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Quote:
Originally Posted by ILLCOMM View Post
The O.Z. Ultraleggera HLT's come with the following info on e92 M3 applications:



The spacers are required for the front as they come in a 34mm offset (vs stock 29mm).

I was pretty much decided on these wheels until I learned that I would need spacers AND centering rings. Sounds like a lot of room for error.
yeah, i am suprised that they don't make a hubcentric solution. a 5mm spacer is no thing, but i agree that i wouldn't want to have to do both. it just seems like having to do too much to make it fit right.

Quote:
Originally Posted by rldzhao View Post
Just to share my experience with spacers. I lived in upstate NY and had spacers on my rears for about 4 months (9-12). When I tried to take the spacers off, both were seized on the hub due to corrosion... really painful experience trying to take them off.

Of course, if cared for properly in dryer weather, this hopefully won't happen. Though I see that you live in Seattle, which has snow. Anyway, it can be done, just with some extra effort. GL!
good advice rldzhao! thanks.
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      02-11-2009, 01:45 AM   #7
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Quote:
Originally Posted by rldzhao View Post
Just to share my experience with spacers. I lived in upstate NY and had spacers on my rears for about 4 months (9-12). When I tried to take the spacers off, both were seized on the hub due to corrosion... really painful experience trying to take them off.

Of course, if cared for properly in dryer weather, this hopefully won't happen. Though I see that you live in Seattle, which has snow. Anyway, it can be done, just with some extra effort. GL!
Should have used anti-seize and/or got Rouge Engineering spacers with the beveled edge.
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