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DIY Guide: How to measure Multi-Piece wheels, lips, barrels.

How to split and rebuild them. Where to find spares. Want gold bolts, wider rims, flat caps etc.

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DIY Guide: How to measure Multi-Piece wheels, lips, barrels.

Postby zerolux » 05 Apr 2008 19:48

i've always noticed there's not much info out there regarding proper ways to measure modular wheels, so i figured i'd share a few things i've learned the hard way. most of the measurements use RS's as a subject. mind you, i could always be wrong but a little common sense shows this method appears to work just fine. and in my experience, these methods also apply to other multi-piece wheels.


first off, when measuring and speaking of lip and barrel sizes, all measurements start at the center's mounting surface and stop at the bead. just as wheel widths are measured bead to bead, not overall width.


with larger (non drop) lips, it's easy to measure lips by laying them on a flat surace, and then measuring to the bead (this lip pictured is a Ronal lip, as you can see, to the bead it's 2.5").

Image


or, if the lips are still on the wheel, you can always measure from the outer surface of the lip to the actual end using a straightedge. then, subtract .25". (i got this number by subtracting the bead width ( .5") and then adding the thickness of the lip ( .25"). lip shown below is a 1" lip

Image


with a drop lip, or a lip that comes off the mounting surface, then drops back towards the barrel (on RS's, .5" & 1" lips are drop lips), it's easiest to use the above method. or use the method shown below. (lip is a .5")

Image
Image


the centers are .5" thick.

Image


barrels are measured the same way, only to the bead (tape reads 7.5", subtract bead width, this barrel is 7")

Image


and here's a diagram to better show how to measure an RS. (note, it's not to scale. i'm a wheel whore, not an engineer. ) :D

Image
Last edited by zerolux on 30 Mar 2009 00:29, edited 1 time in total.
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Postby Ian K » 26 Apr 2008 04:41

Great info Roan! I wonder if this is the same for all wheels, or just BBS? It would make sense to have an understood way of measuring, but you never know.
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Postby Spoolin1x » 26 Apr 2008 16:40

This is the same concept for MOST modular 3 piece wheels.
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barrels.

Postby Purple Beast » 23 Feb 2010 21:31

Hi

thats the way i do mesure the offset

1. measure the complete width of the wheel

2. share the resulte in the middel

3. measure from the inner rim to the area were the wheel get the conntact to the brakedrum (dont no the English word for Anschraubfläche an der Radnabe im Bereich der Bremsscheibe)

4. the middel mesurment is offset 0 (et 0)

5. if the conntact is more to the outside offste is + more to the inside than it is -

This Picture helps often
Image

But the width of a rim u hast to messure fromr the Contact Point to the wheel Center to the area where the rubber gets conntact to the rim.

Hope you can my bad english

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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby thuts » 11 Jan 2011 12:05

the question i have is this:
Image
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby Purple Beast » 11 Jan 2011 13:28

Hi,

What do you want to mesure? Total width? How wide they are? Or the offset?

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http://www.wheel-whores.com/forum/viewt ... =4&t=17360" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby thuts » 11 Jan 2011 16:06

id like to get the measurement from the contact of the outer barrel to the hub
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby Purple Beast » 11 Jan 2011 16:23

Hi

so you want to mesure B in this Picture

Image

Get a long straight thing and lay it on the wheel then mesure down.

Sebastian
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http://www.wheel-whores.com/forum/viewt ... =4&t=17360" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby thuts » 11 Jan 2011 16:38

I added to the pic:
Image

I would like to get the measurement of "E"

I dont have bbs RS wheels yet. so im trying to figure out some math with the inner and outer barrels to find a perfect offset but in order to continue i need to get that measurement
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby Purple Beast » 11 Jan 2011 17:32

Hi

if you dont have RS you need somebody mesure it. Or know it.

My 15" RS are not split at the moment otherwise i can do that.

Sebastian
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http://www.wheel-whores.com/forum/viewt ... =4&t=17360" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby thuts » 11 Jan 2011 17:50

okay thank you. gonna search the board to see if anyone has split wheels at the moment

thank you for your time sebastian
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby jsquareD » 29 Jan 2011 18:34

so i have a set of BBS RS320 and i'm putting 2" and 3" lips on them.
they'll be 17x9.5/10.5 correct?

i know the offset is +43 with the OEM lips. what will the offset be after i put the new lips?
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby lewy » 26 Apr 2011 22:00

Is this the same for replacement Radinox lips?
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby theidi007 » 19 Dec 2012 10:10

yes, is the same.

Radinox I can deliver.
look at my side under www.st-handelsagentur.de

thomas :cheers:
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Re: DIY Guide: How to measure Multi-Piece wheels, lips, barr

Postby Lapdance » 16 Sep 2013 01:54

What if I put 4.5 inch lips on 15x6.5 et 25? What would my size and offset be then?
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