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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > HELP! BBS CH Hubcentric Rings



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      04-25-2012, 11:25 PM   #1
tanginaglaz
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HELP! BBS CH Hubcentric Rings

I recently bought some BBS CH from another forum member. Unfortunately he did not include the hubcentric rings. Even after balancing, there is a slight vibration. I think its because of the absence of these rings. What size are the ones I need? I measured the inner diameter of the wheel hub at ~82mm. Is this correct? BBS CH owners please chime in!
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      04-26-2012, 11:43 AM   #2
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What car did the CH's come off of? The center bore for our cars are 72.5mm, and the E38 7 series have 74.1mm.
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      04-26-2012, 11:54 AM   #3
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What car did the CH's come off of? The center bore for our cars are 72.5mm, and the E38 7 series have 74.1mm.
Bought it off a guy with an E92. I measured it last night and it seems to be around 82mm. Is that correct?
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      04-26-2012, 12:17 PM   #4
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82mm seems quite large, you may want to measure them again with your caliper tool. Here is a chart you can refer to and I never seen an 82mm center bore before.

3 E36/M3 91 to 99 5x120 35 to 42offsets 72.6
3 E46/Z3 1.8 after 98 5x120 35 to 45offsets 72.6
3 Series E30 86 to 91 4x100 15 to 18offsets 72.6
5 Series E34 87 to 95 5x120 15 to 24offsets 72.6
5 Series E39 95 to 03 5x120 15 to 24offsets 74.1
5 Series E60 after 03 5x120 15 to 24offsets 72.6
7 Series E32 87 to 94 5x120 15 to 24offsets 72.6
7 Series E38 94 to 02 5x120 15 to 24offsets 72.6
7 Series E65 after 02 5x120 15 to 24offsets 72.6
8 Series E31 90 to 99 5x120 15 to 24 72.6
M3 E30 89 to 92 5x120 15 to 25offsets 72.6
M3 E46 after 00 5x120 15 to 40offsets 72.6
M5 Series E39 after 99 5x120 15 to 24offsets 74.1
X5 after 00 5x120 50offsets 72.6
Z4 after 03 5x120 37 to 45offsets 72.6

If the person you bought the rims from own an E92, there's a slight possibility that the rims may need to be balanced properly with Road Force.
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      04-26-2012, 12:33 PM   #5
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Quote:
Originally Posted by Hey Ant View Post
82mm seems quite large, you may want to measure them again with your caliper tool. Here is a chart you can refer to and I never seen an 82mm center bore before.

3 E36/M3 91 to 99 5x120 35 to 42offsets 72.6
3 E46/Z3 1.8 after 98 5x120 35 to 45offsets 72.6
3 Series E30 86 to 91 4x100 15 to 18offsets 72.6
5 Series E34 87 to 95 5x120 15 to 24offsets 72.6
5 Series E39 95 to 03 5x120 15 to 24offsets 74.1
5 Series E60 after 03 5x120 15 to 24offsets 72.6
7 Series E32 87 to 94 5x120 15 to 24offsets 72.6
7 Series E38 94 to 02 5x120 15 to 24offsets 72.6
7 Series E65 after 02 5x120 15 to 24offsets 72.6
8 Series E31 90 to 99 5x120 15 to 24 72.6
M3 E30 89 to 92 5x120 15 to 25offsets 72.6
M3 E46 after 00 5x120 15 to 40offsets 72.6
M5 Series E39 after 99 5x120 15 to 24offsets 74.1
X5 after 00 5x120 50offsets 72.6
Z4 after 03 5x120 37 to 45offsets 72.6

If the person you bought the rims from own an E92, there's a slight possibility that the rims may need to be balanced properly with Road Force.
Yeah, it seems that the rims weren't originally for an E92 if the center bore of the wheel is so big. I'll try measuring it tonight with a caliper tool.

Thanks for all the help.
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      04-26-2012, 01:08 PM   #6
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basically if you car needs a hub ring it will require 74.1 to 72.56
is either that size or your wheel has to be hub centric. sometimes when you buy used wheels is good to drive their car with the wheels on as it can be a vibration that the prev. owner never fix. like a out of round wheel or bent wheel.
but i do wish you the best in hopes that the proper hub rings and road force balance will do the trick. ( by the way the road force balance will let you know if its a wheel deffect)
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      04-26-2012, 03:07 PM   #7
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Originally Posted by MRRwheels View Post
basically if you car needs a hub ring it will require 74.1 to 72.56
is either that size or your wheel has to be hub centric. sometimes when you buy used wheels is good to drive their car with the wheels on as it can be a vibration that the prev. owner never fix. like a out of round wheel or bent wheel.
but i do wish you the best in hopes that the proper hub rings and road force balance will do the trick. ( by the way the road force balance will let you know if its a wheel deffect)
Yeah, I already got it balanced and the tirerack guys said the rims are fine. They did suggest hubcentric rings though.
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      04-26-2012, 03:12 PM   #8
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great !! go get them rings and your problems should be good.
as a matter of fact screw this send me a email at info@mrrwheels.com
is your lucky day, im going to send you a set of free aluminum rings 74.1 to 72.56.
just because im feeling good. ( by the way is not my fault if your wheels are actually 88mm lol)
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      04-26-2012, 03:21 PM   #9
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im ready when your ready.

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      04-26-2012, 04:03 PM   #10
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Originally Posted by MRRwheels View Post
great !! go get them rings and your problems should be good.
as a matter of fact screw this send me a email at info@mrrwheels.com
is your lucky day, im going to send you a set of free aluminum rings 74.1 to 72.56.
just because im feeling good. ( by the way is not my fault if your wheels are actually 88mm lol)
You are AWESOME! Sending you my info right now. Thanks! I'll be sure to rep your itrader score.
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      05-01-2012, 12:31 PM   #11
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Update: Got the hubcentric rings that the guys from MRR wheels sent. Worked perfectly! Now I have no vibration! Thanks guys.

Just for future reference, what size are these rings?
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      05-01-2012, 01:27 PM   #12
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i glad everything work out. 74.1 - 72.56
enjoy and hope to see you at Bimmerfest 2012 at the Rosebowl.
stop by and say hello. we started a list for e90 members at the regional section, everyone on the list thats a member at e90 post will get a extra free gift from us.
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      05-01-2012, 03:11 PM   #13
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Originally Posted by MRRwheels View Post
i glad everything work out. 74.1 - 72.56
enjoy and hope to see you at Bimmerfest 2012 at the Rosebowl.
stop by and say hello. we started a list for e90 members at the regional section, everyone on the list thats a member at e90 post will get a extra free gift from us.
Great! Thanks for the info. Yup, I'm already on that list. I will definitely swing by.
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      05-01-2012, 03:11 PM   #14
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Glad everything worked out! Wonder if the guy you got them from experienced the same issues or not lol
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      05-01-2012, 03:48 PM   #15
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I drove with my bbs ch 19" rims without hubsentric rings for two years before i bought for mine... slight vibration. Thought it was something wrong with the tires. With my new kumho tires and rings there are no vibration what so ever...
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      05-01-2012, 04:10 PM   #16
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I have no idea. I did notice that he had a stud conversion kit. That maybe why he did not get any vibrations.
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