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Old 04-21-2012, 03:13 PM   #1
patroklai
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OEM Bolt Pattern - set the record straight!

So I've been looking into adding spacers... I've already read all the "stigma" these things get but I have spacers on my M3 and it performs beautify. That said, I'm looking at two brands, H&R and Eibach.

H&R says the 2010-2012 Camaro uses 5x120. However, the Eibach equivalent part number that fits the same car/year states the bolt pattern is 5x120.65

What gives? Who is right?
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Old 04-21-2012, 03:29 PM   #2
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5x120
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Old 04-21-2012, 03:36 PM   #3
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Good stuff in the owners manual.
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Old 04-21-2012, 07:37 PM   #4
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Originally Posted by blazzin1 View Post
Yes, 5x120mm is correct. 5x120.65 is equal to the old GM standard of 5x4.75". And you can certainly do whatever you want, but I just feel that I should point out that there is a considerable HP and weight difference between an M3 and a 5th Gen Camaro.
I have an e92 M3. It's 414bhp V8 and comparatively accelerates quicker than the camaro due to the short geared 6speed tranny. Ironically, I get better gas mileage from the Camaro. From a weight standpiont, yes, I think the Camaro is heavier...

Last edited by patroklai; 04-21-2012 at 08:05 PM.
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Old 04-21-2012, 07:38 PM   #5
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Originally Posted by OUR72GTO View Post
Good stuff in the owners manual.
aaaahhh! Didn't even think of that... joke is on me. It just puzzled me that Eibach would advertise theirs for the 2010-2012 Camaro being that theirs is 5x120.65

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5x120

Last edited by patroklai; 04-21-2012 at 08:07 PM.
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Old 04-24-2012, 08:45 AM   #6
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Quote:
Originally Posted by patroklai View Post
So I've been looking into adding spacers... I've already read all the "stigma" these things get but I have spacers on my M3 and it performs beautify. That said, I'm looking at two brands, H&R and Eibach.

H&R says the 2010-2012 Camaro uses 5x120. However, the Eibach equivalent part number that fits the same car/year states the bolt pattern is 5x120.65

What gives? Who is right?
5x120 is correct but typically the holes are slightly oversized on spacers so the extra .65mm probably still fits. There are plenty of drag racers running 5 x 120.65 (5x4.75) wheels on their cars without issue. Is it the right thing to do? No, but it is so close that they still bolt up. 5 lug patterns are measured criss-cross so when you think about it that means that the stud is only off by .325 mm each, not very much.



As for spacers, they are not the best idea, especially on a heavy car, but consider that the 5th gen has huge 14mm studs and it doesn't seem as bad. Before the aftermarket wheel companies came out with drag wheels, everyone was running OE Z06 wheels with a spacer. We ran 10.50's all year long with this setup and had no issues whatsoever. We don't recommend it but there are a lot of people already doing it without issue, just stay conservative on the thickness and you will probably be fine.
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Old 04-24-2012, 02:42 PM   #7
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Originally Posted by BMR guy View Post
5x120 is correct but typically the holes are slightly oversized on spacers so the extra .65mm probably still fits. There are plenty of drag racers running 5 x 120.65 (5x4.75) wheels on their cars without issue. Is it the right thing to do? No, but it is so close that they still bolt up. 5 lug patterns are measured criss-cross so when you think about it that means that the stud is only off by .325 mm each, not very much.



As for spacers, they are not the best idea, especially on a heavy car, but consider that the 5th gen has huge 14mm studs and it doesn't seem as bad. Before the aftermarket wheel companies came out with drag wheels, everyone was running OE Z06 wheels with a spacer. We ran 10.50's all year long with this setup and had no issues whatsoever. We don't recommend it but there are a lot of people already doing it without issue, just stay conservative on the thickness and you will probably be fine.

Thanks! This is very informative. I went with H&Rs 25mm all around. This is not a track car nor do I plan or racing it... it's my daily.

Thanks again.
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Old 05-17-2013, 04:08 PM   #8
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Quote:
Originally Posted by patroklai View Post
I have an e92 M3. It's 414bhp V8 and comparatively accelerates quicker than the camaro due to the short geared 6speed tranny. Ironically, I get better gas mileage from the Camaro. From a weight standpiont, yes, I think the Camaro is heavier...
That car is better that the Camaro. I had a 2009 dct m3, I now gave a 2013 ZL1. I was expecting a performance improvement with 580 HP. But they felt the same . I looked it up, MP3 has same 0 to 60, same 1/4 mile, same top speed, and that dct was godly. So an e92 MP3 would make short work of an as Camaro with ease (on the street)
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Old 05-17-2013, 08:05 PM   #9
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OEM bolt pattern

100 percent 5x120mm !!!measured for myself before I made a pair of 5x5 to5x120mm by 37mm thick hub centric to wheel centric adapters to put these widened to 10-1/2 rears on my 1990 Chevrolet truck!!!
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Old 05-17-2013, 08:10 PM   #10
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OEM bolt pattern

Sorry about the rotate !!!
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Old 05-17-2013, 08:14 PM   #11
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OEM bolt pattern

Rotate again !!!
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Old 05-17-2013, 08:45 PM   #12
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Sorry about the rotate !!!
Looks good. Those wheels look familiar.
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Old 05-17-2013, 10:18 PM   #13
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Thanks yotaman,wheels are sweet.rears fit nice with adapters i made but I gotta do some engineering for the fronts to fit but ill post pics of car and truck side by side!!!
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Old 05-18-2013, 01:04 PM   #14
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Its 5x120 but I am sure the Eibach ones will work as well. They probably designed them that way. H&R Spacers have had a long time excellent reputation for quality. I would go with them.
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