Steelie wheel offset?

[Pablo M]

Edit: they’re Chevy Spark wheels, 15x6, et42. Wont work.
 

My son turned me onto a listing near him for e30/e36 parts and the listing included “e30 steelies”, which don’t actually look like e30 steelies and are 15x6, so not e30. 
I’ve been asking for some measurements and he has a basketweave I wanted to compare to, but that basketweave is from a 325ix, so the et is much higher.  The center bore looks the same, and I had him measure from ground up to edge of rim and to center bore. Am I adding right-looks like to the holes might be et35 if my logic is right. If so they’d work. 
 

 

 

 

 

325ix wheel for comparison

 

 

I actually do like the steel wheel look. 
Based on this info can you determine they would work on the 2002? Or are there other measurements he could take? 
Doesn’t seem to have stamped info on the wheel itself except 15x6. 

Edited April 8, 2023 by Pablo M
Added info

[visionaut]

Measuring wheel width like that - edge-to-edge means you have to subtract an inch (25.4mm) for the stated wheel width. (Technically it’s the bead distance in between the lips.) so since it measured 7” there, it’s a 6” wheel.

 

ET, et, or offset is measured from the inner mounting face of the wheel (where it sits against the wheel hub) to the midpoint of the wheel width. Positive means hub sits outward of the midpoint.

 

Measure that, and you’ll know they’re 15x6 et (that distance in mm). Oh yeah weigh one. Lightness is good.

 

IIMO they’d look nice cleaned up..

 

 

Edited April 7, 2023 by visionaut
Oh yeah

[TobyB]

If they're 15x6 E36 steel wheels, the offset will be quite high for a 2002-

 

they ought to work, but wide tires will hit the struts.

 

Wait. 

They can't be E36. 

Not enough lugs.  So they have to be something else.

Likewise, the center bore's too small.  Kind of E30 size, methinks.

 

They LOOK like an E30 offset, just using the eye-o-matic on 

where the hub sits relative to the drop.

If the et is not stamped into them, they're not OEM- Less Schwab sells a LOT

of steel snow rims that look very much like that, but aren't marked much at all.

 

So maybe a Honduh or Scion snow rim that fits an E30.  

 

Me, I'd gamble for small money, and run a small spacer if need be.

 

Because even 15" tires are starting to disappear.

 

t

 

[Pablo M]

22 minutes ago, TobyB said:

If they're 15x6 E36 steel wheels, the offset will be quite high for a 2002-

 

they ought to work, but wide tires will hit the struts.

 

So maybe a Honduh or Scion snow rim that fits an E30.  

 

Me, I'd gamble for small money, and run a small spacer if need be.

 

Because even 15" tires are starting to disappear.

 

t

 

Actually found the wheels. They’re for a 2016 Chevy Spark. Et42 so they won’t work. 
thanks for your thoughtful reply though!

[Conserv]

And my quick calculation, from your photos — which is a highly inaccurate method — yields an ET of 43 mm.

 

A.  Backspace (this locates the hub face, as measured from the rear plane of the rim)

= 135 mm. (first photo)

Less:

 

B.  1/2 x the Rim’s Width (this locates the theoretical center of the rim, front to back)

 

= 1/2 x 184 mm. (second photo) = 92 mm.

 

Equals:

 

C.   Offset

 

135 mm. - 92 mm. = 43 mm.