Hub Center Bore Questions

BAMFM3 · 08-03-2020, 03:18 PM

I have a set of 19" wheels with a center bore of 73.1mm...OEM is 72.56mm.

I can't find 73.1 to 72.56mm hub centric rings anywhere except eBay. I bought them and they didn't fit. Do you think I will have issues running the wheels as is? Mainly concerned about damaging the hub or being dangerous.

Appreciate all of the help!

SYT_Shadow · 08-03-2020, 03:46 PM

You need a hub centric spacer to run those wheels. The weight of the car rests on the hub

tdott · 08-03-2020, 03:48 PM

Have the wheels bored out maybe?

74.1mm is a more common size because E39s came with that size, so you'll likely find hub rings easier.

Throatpunch · 08-03-2020, 05:56 PM

Quote:

Originally Posted by SYT_Shadow

You need a hub centric spacer to run those wheels. The weight of the car rests on the hub

It kinda does but not a necessary
Ton of people race track and autox without hubcentric rings without issues. I had volks that werent and even cracked the spokes from autox stress

BAMFM3 · 08-03-2020, 10:21 PM

Thanks everyone. So I risk damaging the expensive hub if I run the wheels is what I am guessing?

Can Tire Rack or Apex Race Parts chime in as well?

BAMFM3 · 08-04-2020, 07:02 PM

Anyone else? Trying to find someone who will custom make plastic rings for me, as the aluminum ones keep bending in the mail...

Throatpunch · 08-06-2020, 01:58 PM

0.5mm is such a small width no one will make that for you
Only option is to get custom spacers that match the hub bore and wheel bore
Either way you are overthinking this

M3R1 · 08-06-2020, 04:00 PM

Quote:

Originally Posted by BAMFM3

I have a set of 19" wheels with a center bore of 73.1mm...OEM is 72.56mm.

I can't find 73.1 to 72.56mm hub centric rings anywhere except eBay. I bought them and they didn't fit. Do you think I will have issues running the wheels as is? Mainly concerned about damaging the hub or being dangerous.

Appreciate all of the help!

You could get several .010 feeler gages (two per wheel). They are very flexible and will fill the little gap for you. It might be tricky to get them in there, but can be done with a little ingenuity. It's not ideal, but better than nothing. There will be no material that will be significantly stronger at that thickness.

Or find wheels that have a hub bore that it correct.

GL!

BAMFM3 · 08-06-2020, 06:55 PM

Thanks for the responses. These are just holdover wheels for now. Just waiting for Apex wheels to come back in stock!

tsk94 · 08-07-2020, 10:07 AM

For driving on the street, a non hub-centric wheel will be okay. For track use I'd strongly recommend using only hub-centric wheels, otherwise instead of the hub bearing all the load, it's going to be on your studs/lugs.

6ixSpd · 08-16-2020, 05:49 PM

Duct tape once around on the protruding hub lip. Done.

GORDON.M3 · 08-16-2020, 09:07 PM

Bore it out to 74.1mm, no it will not damage the wheels or cause an issue with the structural integrity of the wheels. Then run 74.1 metal hub-centric rings to 72.6. I've done this with wheels in the past, and it was not an issue at all.

Alternatively, you can use Plumber's tape wrap. Duct tape might be too thick depending on the brand you use. With the plumber's tape, you can create enough thickness when you mount the rim it will crush to size.

Bartledoo · 08-18-2020, 09:52 AM

Quote:

Originally Posted by Throatpunch

It kinda does but not a necessary
Ton of people race track and autox without hubcentric rings without issues. I had volks that werent and even cracked the spokes from autox stress

These cars break a lot of studs/bolts on track.

BAMFM3 · 08-21-2020, 08:02 AM

I've decided I'm either going to wait for the black Apex EC-7 (9.5x19 F, 10.5x19R) or go with ESR RF1 in the same specs. Both 72.56mm center bore.

Hounje12 · 08-23-2022, 12:26 PM

You might have some issues running the wheels as is. If the center bore is off by that much, it could damage the hub or be dangerous. You could try https://hubbore.com/ to see if they have any hub centric rings that would fit your wheels.

Scharbag · 08-25-2022, 07:02 AM

You can also bore the center out and have the shop press fit in new center rings.

GORDON.M3 · 08-25-2022, 11:52 PM

Quote:

Originally Posted by Scharbag

You can also bore the center out and have the shop press fit in new center rings.

This works, also. BBS uses a 82mm bore with 72.56 PFS adapters for most current/modern BBS wheels.
Adapter rings are not a problem as long as they are machined properly and tolerance is accurate.

08-03-2020, 03:18 PM	#1
BAMFM3 Second Lieutenant 67 Rep 288 Posts Drives: 2022 Audi SQ5 Join Date: Jun 2012 Location: NC iTrader: (6)	Hub Center Bore Questions - off by 0.5mm I have a set of 19" wheels with a center bore of 73.1mm...OEM is 72.56mm. I can't find 73.1 to 72.56mm hub centric rings anywhere except eBay. I bought them and they didn't fit. Do you think I will have issues running the wheels as is? Mainly concerned about damaging the hub or being dangerous. Appreciate all of the help! __________________ 22 Florett Silver SQ5 13 Silverstone II E92 M3 (Sold) 19 Shadow Black Shelby GT350 (Sold) 13 Mineral White E92 M3 (Sold) 11 Melbourne Red E92 M3 (Sold)
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08-03-2020, 03:46 PM	#2
SYT_Shadow ///M Powered for Life 11469 Rep 10,328 Posts Drives: E90M/E92M/M4GTS/M4GT4/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	You need a hub centric spacer to run those wheels. The weight of the car rests on the hub __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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08-03-2020, 03:48 PM	#3
tdott Brigadier General 3938 Rep 3,980 Posts Drives: M3 Join Date: Nov 2010 Location: South FL / 6ix iTrader: (4)	Have the wheels bored out maybe? 74.1mm is a more common size because E39s came with that size, so you'll likely find hub rings easier. __________________ N/A S65 Headers Before/After Dyno Results
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08-03-2020, 10:21 PM	#5
BAMFM3 Second Lieutenant 67 Rep 288 Posts Drives: 2022 Audi SQ5 Join Date: Jun 2012 Location: NC iTrader: (6)	Thanks everyone. So I risk damaging the expensive hub if I run the wheels is what I am guessing? Can Tire Rack or Apex Race Parts chime in as well?
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08-04-2020, 07:02 PM	#6
BAMFM3 Second Lieutenant 67 Rep 288 Posts Drives: 2022 Audi SQ5 Join Date: Jun 2012 Location: NC iTrader: (6)	Anyone else? Trying to find someone who will custom make plastic rings for me, as the aluminum ones keep bending in the mail... __________________ 22 Florett Silver SQ5 13 Silverstone II E92 M3 (Sold) 19 Shadow Black Shelby GT350 (Sold) 13 Mineral White E92 M3 (Sold) 11 Melbourne Red E92 M3 (Sold)
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08-06-2020, 01:58 PM	#7
Throatpunch Captain 365 Rep 674 Posts Drives: 2008 E93 M3 Join Date: Jun 2010 Location: Philly, PA iTrader: (0)	0.5mm is such a small width no one will make that for you Only option is to get custom spacers that match the hub bore and wheel bore Either way you are overthinking this
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08-06-2020, 06:55 PM	#9
BAMFM3 Second Lieutenant 67 Rep 288 Posts Drives: 2022 Audi SQ5 Join Date: Jun 2012 Location: NC iTrader: (6)	Thanks for the responses. These are just holdover wheels for now. Just waiting for Apex wheels to come back in stock!
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08-07-2020, 10:07 AM	#10
tsk94 Lieutenant Colonel 1522 Rep 1,591 Posts Drives: E92 M3, E82 128i, F82 M4, E36 Join Date: May 2017 Location: Calgary iTrader: (2)	For driving on the street, a non hub-centric wheel will be okay. For track use I'd strongly recommend using only hub-centric wheels, otherwise instead of the hub bearing all the load, it's going to be on your studs/lugs.
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08-16-2020, 05:49 PM	#11
6ixSpd Save the manuals! 6012 Rep 6,740 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	Duct tape once around on the protruding hub lip. Done. __________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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08-16-2020, 09:07 PM	#12
GORDON.M3 Colonel 1417 Rep 2,997 Posts Drives: E92 M3 • F25 X3 M-Sport Join Date: Dec 2013 Location: LAX/YYZ/NRT iTrader: (11)	Bore it out to 74.1mm, no it will not damage the wheels or cause an issue with the structural integrity of the wheels. Then run 74.1 metal hub-centric rings to 72.6. I've done this with wheels in the past, and it was not an issue at all. Alternatively, you can use Plumber's tape wrap. Duct tape might be too thick depending on the brand you use. With the plumber's tape, you can create enough thickness when you mount the rim it will crush to size. __________________ INSTAGRAM: GORDON.M3 North American Mr12Volt Carplay/Android Auto Distributor DINAN \| EVOSPORT \| VAC \| ARP \| RD SPORT \| NEEZ \| EIBACH \| CSF \| IND \| BILSTEIN \| KLASSEN \| BREMBO \| ENDLESS \| BBS \| BPM SPORT \| PROJECT MU \| EVENTURI
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08-21-2020, 08:02 AM	#14
BAMFM3 Second Lieutenant 67 Rep 288 Posts Drives: 2022 Audi SQ5 Join Date: Jun 2012 Location: NC iTrader: (6)	I've decided I'm either going to wait for the black Apex EC-7 (9.5x19 F, 10.5x19R) or go with ESR RF1 in the same specs. Both 72.56mm center bore. __________________ 22 Florett Silver SQ5 13 Silverstone II E92 M3 (Sold) 19 Shadow Black Shelby GT350 (Sold) 13 Mineral White E92 M3 (Sold) 11 Melbourne Red E92 M3 (Sold)
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08-23-2022, 12:26 PM	#15
Hounje12 Registered 0 Rep 1 Posts Drives: BMW 3 Series Join Date: Aug 2022 Location: Hamburg, Germany iTrader: (0)	You might have some issues running the wheels as is. If the center bore is off by that much, it could damage the hub or be dangerous. You could try https://hubbore.com/ to see if they have any hub centric rings that would fit your wheels. Last edited by Hounje12; 08-24-2022 at 07:47 AM..
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08-25-2022, 07:02 AM	#16
Scharbag Colonel 2619 Rep 2,138 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	You can also bore the center out and have the shop press fit in new center rings. __________________ 2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies...
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