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BBS RC041-Reverse build.


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#1 giles

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Posted 26 August 2011 - 02:12 PM

Hi, not a wheel whore, just like wheels.
Im thinking of building some bbs rc041's.
However i have seen 1 or 2 with reverse build, for higher et and a different look.
(bronze mk2 in mk2 section)
Wondered what bolts you'd use. the existing ones?...correct length?
Anybody else done this.

Thanks. G

#2 GolfIIVR6

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Posted 26 August 2011 - 03:07 PM

You mean the style5's?
If so you need or the orginal ones the pressed bolts or M8 bolts.
Pressed bolt are only aftermarket(chrome/gold) these days because BMW doesnt deliver them anymore.

#3 giles

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Posted 26 August 2011 - 03:17 PM

Hi. No rc 041's
Thanks for the reply tho.

#4 andys2k

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Posted 26 August 2011 - 03:34 PM

pics?

#5 fastmk1

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Posted 26 August 2011 - 03:54 PM

Style 5's are RC090.

I wouldnt have thought youd need different bolts as youre only changing the orientation of the dish, centre and basket so the thickness will remain the same, right?

Also, arent RC 041 and 042 wheels 2 peice?..

#6 giles

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Posted 26 August 2011 - 09:13 PM

[quote name='fastmk1' timestamp='1314374050' post='3883594']
Style 5's are RC090.

I wouldnt have thought youd need different bolts as youre only changing the orientation of the dish, centre and basket so the thickness will remain the same, right?

Also, arent RC 041 and 042 wheels 2 peice?..

Yup they are 2 piece so should be easy? He says!
I dont know how to quote pictures, but if you check out page 276 of mk2 faves lovers and critiques you'll see what im on about!
....Assuming the thickness of the basket is 8mm, do i assume with the reverse build it'll give me another 8mm of offset? basket looks flat?

ta g

#7 matt@onlychargeddubs

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Posted 26 August 2011 - 09:41 PM

i'll admit now i don't know much about split wheels

but surely you can't reverse mount 2 piece splits?

#8 Polo Classic

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Posted 26 August 2011 - 09:44 PM

i'll admit now i don't know much about split wheels

but surely you can't reverse mount 2 piece splits?


Sure you can, providing it is a 2-piece rim with barrel and face, not a 2-pc rim where the dish comes off. It also depends on the machining of the face/center.

It is fairly easy to do on BBS LM's

Edited by Polo Classic, 26 August 2011 - 09:46 PM.


#9 matt@onlychargeddubs

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Posted 26 August 2011 - 10:11 PM

i see, as in the outer lip is part of the barrel too.

got it, told you i didn't know owt about splits :lol:

#10 giles

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Posted 27 August 2011 - 06:26 PM

So to all experts, I should be ok using existing bolts. M8's?

#11 Polo Classic

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Posted 27 August 2011 - 06:39 PM

They are most likely M7.

Go with old ones is they look ok, and torque them to the right setting. I'm sure you will find the spec in the polishers tread in the faq

#12 Tewkes

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Posted 27 August 2011 - 06:44 PM

Id imagine you'd have to use a slightly longer bolt as when you screw in from the face of the dish down into the centre piece, the bolt doesnt really do all the way to the bottom of the hole does it? So there fore if its reverse mounted it would have to clear the whole centre section THEN go into the dish. Id get longer to be safer and risk them not being screwed in enough.

#13 Polo Classic

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Posted 28 August 2011 - 03:53 PM

If it is the type that use bolt and nut, it will be the same lenght. The centers width and the width of the dish does not change

#14 fastmk1

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Posted 31 August 2011 - 10:41 AM

Sure you can, providing it is a 2-piece rim with barrel and face, not a 2-pc rim where the dish comes off.


Huh? They're both the same thing :wacko:

If the barrel/basket and face are joined as one, then the dish has to come off to make it a 2-piece.

#15 Tewkes

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Posted 31 August 2011 - 10:48 AM

Some wheels split differently, the barrel and dish are together and the centre (face) splits from them.

#16 Tewkes

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Posted 01 September 2011 - 10:31 AM

Any more info on this with bolts?

#17 jamie..

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Posted 01 September 2011 - 10:59 AM

you use the orignal bolts, your only moving the face onto the otherside of the dish, it keeps the same width. i think when i built mine i should have done them reverse.

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#18 craigolfmk4

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Posted 01 September 2011 - 11:45 AM

Style 5's are the name given to the series of wheels RC040, RC060, RC090. They all contain a various offset, width, ET etc dependant upon the number they are. They all are a 2 piece rim and do however hold the same bolt as the RC041/42 wheels to piece them together. The size of the bolt is an M7 x 30 (with a spline).

Now think about the wheels for a second, the splined mount is inside the face of the dish. If you were going to reverse mount (and place the centre on the dish, then the splined area (both on the bolts and dish) would be ineffective as they have nowhere to 'grip'. With this being the case you will need to increase the size of the bolt with (but still keep the same thread length as you're not altering the length the bolt is required to travel) thus ending up with M8 x 30. You will also need different nuts to secure these.

#19 Danster

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Posted 01 September 2011 - 11:45 AM

Id be very careful about doing this. I was going to do this with some RC090's but wheels that are designed to be reverse mounted have a lip on the back of them which presses into the barrel to give it strength. If you do this with wheels without this lip on the back of the centre all of the weight is on the bolts which arent strong enought to take the stress.

:ph34r:

#20 Tewkes

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Posted 01 September 2011 - 12:09 PM

So what bolts and nuts are needed... M8 x 30?