I'm confused about hub size 74.1-72.56

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bigboystoy
Posts: 68
Joined: Wed Feb 13, 2019 4:22 am
Location: Melbourne, Australia

I'm confused about hub size 74.1-72.56

Post by bigboystoy »

Over the weekend I purchased a lovely set of BBS RC302 wheels for my Red ride. Now, I bought these understanding the E24 hubs were 72.56mm for which these wheels were perfect, but when I went to test fit them today, I discovered my hubs are 74.1mm. WTF!!!!

Did I misunderstand what I'd been reading or is my car different?

As I need to fix this regardless, can anyone point me in the direction for getting the correct hub centric rings with OD 82mm with ID 74.1mm. The rings that were in the wheels I've been able to remove so just need to chase down a supplier of the correct rings.
Past toys:
1979 Volvo282GT
1988 Porsche 944S
Current toy:
1986 635 CSi
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hornhospital
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Re: I'm confused about hub size 74.1-72.56

Post by hornhospital »

Your hubs are 72.56mm, not 74.1 as you stated. All E24s have the same 72.56mm hubs. I think you just got confused and listed it backwards.
You've figured out you need hub hubcentric 72.56 to 74.1 rings. Most tire stores carry them. Pep Boys I know has them.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
speter
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Re: I'm confused about hub size 74.1-72.56

Post by speter »

Hi Bigboystoy,
if it's not modified, the hubs are 72.56mm for e24 ( all gens ), whilst rc302 came with 74.1mm ( originally e39 fitment), hence you'll need the hubcentric rings. I got the exactly same type of rings in a nearby bmw servcice shop for a few bucks.
Cheers!
'80 635csi m90 5-speed dogleg
GRNSHRK
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Re: I'm confused about hub size 74.1-72.56

Post by GRNSHRK »

Please refer to this thread for info and sources =D>

viewtopic.php?f=4&t=3358

That set I got from Discount Tires Direct is spanking nice \:D/
:mrgreen:
Bobbo
1980 633 CSi Cypress Green/Pearl Beige
2017 X5 M Sport Xdrive 35i Carbon Black/Ivory White
2005 330 Ci ZHP Cabrio Imola Red/Bone/Black
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bigboystoy
Posts: 68
Joined: Wed Feb 13, 2019 4:22 am
Location: Melbourne, Australia

Re: I'm confused about hub size 74.1-72.56

Post by bigboystoy »

So after a good sleep, I again checked out the hub sizes this morning. Using one of the spigot rings I removed from the new wheels, I tried it on all four hubs. To my surprise the LHS (passenger side) of the car was 72.5mm whilst the RHS (drivers side) was 74.1mm. :shock:

With a bright torch and a wire brush I discovered the RHS had spigots stuck to the hubs and as I only test fitted this side, that's why I got the measurements I did. As for the wheels I took off, the LHS wheels had the spigots stuck in them whilst the RHS were left on the hubs.
spigot.jpg
spigot.jpg (47.02 KiB) Viewed 9064 times
Anyways, on the new wheels, 2 of the 4 fitted spigots were not usable so they needed replacing anyway. So, I'm off to purchase the correct 72.5mm hub spigots for the wheels.
Wheels.jpg
Wheels.jpg (63.02 KiB) Viewed 9064 times
Thanks all for the answers.
Past toys:
1979 Volvo282GT
1988 Porsche 944S
Current toy:
1986 635 CSi
speter
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Joined: Mon Aug 14, 2017 8:57 am
Location: Hungary

Re: I'm confused about hub size 74.1-72.56

Post by speter »

Great =D> as soon as the wheels are on, pls feel free to share the imgs :wink:
'80 635csi m90 5-speed dogleg
bigboystoy
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Joined: Wed Feb 13, 2019 4:22 am
Location: Melbourne, Australia

Re: I'm confused about hub size 74.1-72.56

Post by bigboystoy »

After a bit of filing, grinding and gentle belting with a hammer, I was able to get the hub rings back into a usable state for the short term until new ones arrive.

These are not the best photo's but you get the idea. Next on the list is to get rid of the SUV stance.
BBS RC302 17x8.5 ET15 235 45 17
BBS RC302 17x8.5 ET15 235 45 17
wheels2.jpg (71.62 KiB) Viewed 9049 times
BBS RC302 17.8.5 ET15 235 45 17
BBS RC302 17.8.5 ET15 235 45 17
wheels3.jpg (78.32 KiB) Viewed 9049 times
Past toys:
1979 Volvo282GT
1988 Porsche 944S
Current toy:
1986 635 CSi
speter
Posts: 38
Joined: Mon Aug 14, 2017 8:57 am
Location: Hungary

Re: I'm confused about hub size 74.1-72.56

Post by speter »

Awesome 8)
Thx for the pics. Good luck with the further wheel adjustments :-)
'80 635csi m90 5-speed dogleg
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Re: I'm confused about hub size 74.1-72.56

Post by GRNSHRK »

Funny, SUV stance #-o

Yes, she would look better lowered a bit :-k

Nice example and great set of wheels =D>

We need to hear more about your 6er [-o<
:mrgreen:
Bobbo
1980 633 CSi Cypress Green/Pearl Beige
2017 X5 M Sport Xdrive 35i Carbon Black/Ivory White
2005 330 Ci ZHP Cabrio Imola Red/Bone/Black
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