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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 09-30-2005, 09:57 AM
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Spartacus_33 Spartacus_33 is offline
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Hubcentric Wheel Spacers?

Anyone have any experience buying wheels that require hubcentric spacers?

Apparently Ronal wheels require the use of them. Just wondering if there are any known problems with vibration or having them come loose.

Any comments would be appreciated.
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  #2  
Old 09-30-2005, 11:07 AM
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DZeckhausen DZeckhausen is offline
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Quote:
Originally Posted by Spartacus_33
Anyone have any experience buying wheels that require hubcentric spacers?

Apparently Ronal wheels require the use of them. Just wondering if there are any known problems with vibration or having them come loose.
I think you meant to use the term "centering rings" rather than hubcentric spacers.

If a wheel manufacturer wants to save money, they can bore out the hub to a diameter larger than all of their various applications. When they sell that particular wheel to, say, an E39 540i owner, they include a centering ring that necks the hub centerbore diameter down to 74.1mm. They can sell the same wheel to an E60 5-Series owner by including a centering ring that is thicker and necks the centerbore down to 72.5mm.

Using this technique doesn't imply the wheel manufacturer is inferior. For example, many BBS wheels use PFS (I think that stands for "Precision Fit System") centering rings. As long as the centering ring is good quality and accurately machined, you should have no problems. If the centering ring is made of plastic, insead of metal, you may have problems if you take the car to the track, since the excessive heat may damage the plastic rings. But that's only my theory. It may be a non-issue thanks to modern, high-temperature plastics.
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  #3  
Old 09-30-2005, 11:20 AM
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Spartacus_33 Spartacus_33 is offline
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Quote:
Originally Posted by DZeckhausen
I think you meant to use the term "centering rings" rather than hubcentric spacers.

If a wheel manufacturer wants to save money, they can bore out the hub to a diameter larger than all of their various applications. When they sell that particular wheel to, say, an E39 540i owner, they include a centering ring that necks the hub centerbore diameter down to 74.1mm. They can sell the same wheel to an E60 5-Series owner by including a centering ring that is thicker and necks the centerbore down to 72.5mm.

Using this technique doesn't imply the wheel manufacturer is inferior. For example, many BBS wheels use PFS (I think that stands for "Precision Fit System") centering rings. As long as the centering ring is good quality and accurately machined, you should have no problems. If the centering ring is made of plastic, insead of metal, you may have problems if you take the car to the track, since the excessive heat may damage the plastic rings. But that's only my theory. It may be a non-issue thanks to modern, high-temperature plastics.
These are exact fragments from a couple of e-mails from Ronal to me.... "Hubcentric spacers are $25 each."

"The hubcentric spacers attach inside the wheel and are hubcentric to the
car. TUV approved
."
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Last edited by Spartacus_33; 09-30-2005 at 11:23 AM.
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  #4  
Old 09-30-2005, 11:54 AM
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Ågent99 Ågent99 is offline
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Well, don't get lost in the wording:

Hubcentric: centered around the hub

Centering ring: ring centered...around the hub I presume

Same thing I believe.
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