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-   -   Question about Rims?? (http://www.maxbimmer.com/forums/showthread.php?t=136135)

Hoopie 08-19-2010 07:59 PM

Question about Rims??
 
I have a 2006 323i and saw a set of M3 reps at a pretty decent price. I am wondering if they will fit on my car but have no idea what the numbers mean on the web-site!????

This is what they say:

BMW M3 Gun Metal with Machined Surface:
18"x18.5"
ET: 37
PCD: 120
C.B: 72.6

Will these be OK???

Thank you in advance,
"Hoopie"

kical 08-19-2010 09:50 PM

hey
so 18" means width of the rim if the set is stagerred then 18" are fronts and 18.5" rears.
et is the offset size so 37 will fit you car for sure without any rubbing (the higher et means rims going more outside)
i'm guessing that pcd is bolt pattern 5x120

i have 19" stagerred 8.5 front and 9 rear with 35 offset and everything works nice.

cheers

Hoopie 08-19-2010 09:57 PM

Thank you very much kical for the response!!!

kical 08-19-2010 10:37 PM

i just realized i made mistake...sorry....18" is the diameter of the rim and probably on the website is 18"x8.5" so it means diameter is 18 inches and width is 8.5 inches so if all 4 rims are 8.5" wide they are not staggered

killakill 09-06-2010 07:33 PM

i can sell you my set for $1000 with tires let me know just bought it two weeks ago with tires same specs as the ones your looking at

no scratches no curb rash

AC-Schnitzel 09-11-2010 12:02 AM

18"x18.5" - The 18" stands for the diameter of the wheel (ie: how big the rims are), and the 18.5" must be a mistake to mean 8.5" which signifies that the rims are 8.5" wide (ie the thickness of the rims if looking from the back of the car will be 8.5" wide on each rim)

ET: 37 - This is referring to the offset of the wheels and is basically the distance from its hub mounting surface to the center of the wheel (kind of hard to get into so you can look it up here for more in depth info: http://www.tirerack.com/wheels/tech/...jsp?techid=101)

PCD: 120 - PCD stands for the Pitch Circle Diameter and this measurement is the distance between the center of two diametrically opposite bolts...This can sometimes be referred to as a 5 X 120 figure meaning that there are 5 bolts with the distance of two diametrically opposite bolts being 120mm apart from each other.

C.B: 72.6 - CB stands for Center Bore and basically is the part (or hole) where your rim attaches to the car. The 72.6 is referring to the center bore of the hub being 72.6mm in diameter.

It may all seem a bit confusing but once you go through the act of buying one set of wheels you will learn quite a lot...as far as "will these rims fit on my car" there are a lot of things one can do to "make" a desired set of rims fit...anywhere from rolling fenders to adding spacers...your best bet is to call up a local shop and act as if your interested in purchasing rims from them but are unsure of the sizes that will work...get them to list off your specs and there you go!..good luck with the purchase

azn_oo1 09-11-2010 09:15 AM

whats the lowest offset a e90 can use? can e46 m3 rims go onto a e90 2009

xs650boy 10-27-2010 08:32 PM

I think its typically +35 for e90 and +40 for e46. At least that's what I noticed on tire rack

DimSumE90 12-01-2010 01:13 PM

I am running +20 on my rears no problem or rubbing even lowered.


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