Going from 13 inch Alpina wheel to 15 inch Alpina Wheel

[Mark92131]

34 minutes ago, -PORSCHE- said:

What offset issues did you have with the 6X15 ET12?

 

My neighbor had 15" Alpina E12 replicas on their car, looked great, bad rubbing in the front on sharp turns into driveways.

 

Mark92131

[Lucky 7]

OZ made a 15x7 et 12 Alpina rep that will not work without fender pulling. Perhaps the neighbor had those?  The pics looks like them to me. 
 

To make quite clear, a 15x6 et12 puts the outer face of the wheel in exactly the same spot as a 15x7 et25. With those offsets, it’s the inner lip that moves. If you have suspension rub with the 7, the 6 would give you an inch of additional inner clearance.  Fender clearance (outer) will be the same between those two rims. 
 

I split time between wheel sets measuring 16x7 et25 and 15x6 et12 and have no rubbing issues. Fenders are not pulled or rolled and I run the car low. I need to mount a curb at full lock to get into my driveway and still no rubbing.  
 

After 50 years all these cars are slightly different so your results may vary of course, but any definitive statements about this setup not working are misplaced. 

[Gordon]

On 1/18/2024 at 9:17 PM, Lucky 7 said:

ET12 works with the 6”, but not with 7”. If you go with a 7”, you’ll want ET25. As mentioned, I like the 6” Maxilites because they have a lip and some depth to the face. The Rotas are 7” ET25 and have much less lip. 

15X6 ET12 won't work,  I had a set of Alpina replicas in this size and had rubbing issues,  they didn't last long on my tii.  MSW 15X6 ET33 basketweaves fit well.  Here's a pic of them on Wends former tii.  Notice they do not have a lip on them in the 2nd pic. Gold wheels on the tii on the right compared to the 15X7 ET26 MSW basketweaves  (with a lip) on the tii on the left.

[Gordon]

7 hours ago, -PORSCHE- said:

Gordon,  What offset issues did you have with the 6X15 ET12?  How were those issues resolved with the 7X15 ET26?  Given that’s the look I’m after (the Alpina turbines) I wish I had a zero to low risk specification to fit on my car without issues.  

Rubbing issues on the fender, even after rolling the fenders.  A 15X6 ET12 wheel was designed for an E21 fitment, not a 2002. I did my homework  and quickly sold them and went with 15X7 ET25 Rota RB wheels.  The key to getting a 15X7 wheel to fit on a 2002 is proper offset.  Lots of 15" 4x100 wheels for sale on FB Marketplace and Craigslist.  Most have a high offset for a FWD car.  For proper 15X7 wheel fitment on a 2002, the wheel should have an offset of ET 22-29 with ET25 being ideal.  Read the link in my earlier post to learn more. This pic shows the stance I want. The wheels on my tii are 15X7 ET25 Centra Type 11 with 195/50-15 tires.  Suspension is Bilstein sport shocks,  Eibach springs.  

[Lucky 7]

2 hours ago, Gordon said:

A 15X6 ET12 wheel was designed for an E21 fitment, not a 2002. I did my homework  and quickly sold them and went with 15X7 ET25 Rota RB wheels.

Your argument is with Euclid, and I don’t like your odds. 🤣

 

The math don’t lie:

 

Yes, the 15x6 et12 is an E21 fit. Yes, it will work on the 2002. If you did in fact have that wheel size, your outer lip was 2.5 inches out from your hub, exactly the same as your 15x7 et25. Any rubbing you had was a tire size issue. 
 

Your range of ET 22-29 on a 7” wheel could potentially put the outer lip 3mm FARTHER outboard than the 15x6 ET12. 
 

Don’t believe me?  Here’s a offset calculator:

 

Just a moment...

WWW.1010TIRES.COM

and I saved you the trouble:

 

See?  The 6” has the same dim to outer lip, but an additional 1” of inner clearance.  If the 7” works, the 6” definitely works (at these offsets).  Also, I have this wheel on my car RIGHT NOW with no issues, so don’t tell me it doesn’t work. 
 

I’m not trying to start shit here, merely attempting to provide accurate information for those who might benefit from it. As always, do your own research and make your own decisions.  
 

I’ll be upstairs screaming into a pillow. 

Edited January 22 by Lucky 7

[Tommy]

35 minutes ago, Lucky 7 said:

Your argument is with Euclid, and I don’t like your odds. 🤣

 

The math don’t lie:

 

@Gordon Perhaps tire was changed too? From the picture it looks that maybe you had 205/50 on the ET12 wheels?

 

@Lucky 7 Funny thing - Though the math don't lie it makes a lot more difference which tire you have on ET12 6" than ET25 7". With ET25 you have a chance to fit 205, while with ET12 it's pretty much impossible.

 

Still I'm saying ET27 is the optimum for 7" width (over ET25 that everybody claims) and for 6" I'd prefer...well depending on tire...for 205 it is still ET27, but for 195 ET15 to 35 should be fine. ET also has a big effect on steering effort which is why I'd prefer higher ET.

[-PORSCHE-]

Wow, guys.  I never meant for this to happen.  I thought I would just get idiot-proof information to be able to go out and buy a set of wheels and tires, slap them on my car and forget about it forever.  So sorry!  

 

I’m not a wheel expert (obviously), but the win win here may be that you’re all right.  Lucky’s E12s obviously, empirically work - and look spectacular IMO. So do the other wheels discussed.  Could it be that because the face is farther inset on that particular Maxilite wheel changes the calculation somehow?  

 

Is there any other wheel that works on the 2002 that also has the tasty lip on the outside?  

 

BTW, my car is sitting on a fresh set of H&R springs.  Interestingly, the front hubs have 17mm wheel bolts and the rears have regular 19mm lug nuts.  I guess that means my tastefully hotrodded 1602 has E21 (or other) struts up front.  Dunno.  Who knows what effect that will have on the choice of offset?

Edited January 22 by -PORSCHE-
Added a space

[Gordon]

38 minutes ago, -PORSCHE- said:

 

Is there any other wheel that works on the 2002 that also has the tasty lip on the outside

Spend some time in this wheel database. 

https://www.bmw2002faq.com/wheels/bmw2002/

[M3M3]

42 minutes ago, Gordon said:

Spend some time in this wheel database. 

https://www.bmw2002faq.com/wheels/bmw2002/

and here....

 

[bob02]

-PORSCHE-, you likely have e21 hubs and I'm  guessing vented rotors with Girling/Volvo calipers up front? Common 'upgrade' for 02's. Plenty of room for 15" wheels but hit or miss with 13".

 

 Bob

[uai]

On 1/19/2024 at 1:15 AM, resra said:

Do you have the genuine Alpina 13 inch wheels or the OEM e21 13 inch Alpina look a like wheels? The genuine Alpina 13 inch rims were staggered.

If you really have 5.5x13 Alpina wheels they are really rare and sought after but I assume you have e21 Alpina Look wheels.
Just add pictures an we might help

And +1 to Tommy's comment Tire model has a large influence and not all 02's are the same there are some where 185/70-13 on 5.5x13 ET 18 rubs and there are other where it doesn't 
If you adhere to BMW recommendations everything more than 5,5" requires turbo stubaxles in the rear anyway - in germany you wouldn't get it legalized without them if the TÜV guy is bright

Edited January 22 by uai

[EricB]

Don.t buy staggered Alpine wheels for a 2002.  I bought a pair during my restoration and then had the wheels painted before finding out they don't fit on a 2002.  Period.  Buy Maxilite or Rota replicas which are not staggered and are the correct offset.  Expensive lesson.

[Zak]

On 1/19/2024 at 7:15 AM, bob02 said:

Why not start with a sticky 205/60/13? Anything but sedate and you already have one of the coolest wheelsets for an 02! Plus you'll save money and not add dead weight to all four corners.

I use this combination. And, there are several touring tire brands with stiff sidewalls and sticky rubber which work great. The problem with the 15" wheels & tires is that they are too heavy and a very low profile is necessary to fit them to an 02, which results in a rough ride with very little compliance. It's almost as if you took a rubber band and stretched it around a large solid wheel. There are still some brands which make a 185/70 with a stiff side wall. That is also a proven tire size for these cars.

[Chris_B]

Pic of my 02 with Rota Alpina look-alikes. Brigestone 205/50-15 RE-11s. My front fender lips have been rolled by a PO, but it seems they would fit without that. If anyone really cared, I could likely dig up the offset of these wheels. The car rides and sticks well (H&R sport springs with Bilstein HDs).

[uai]

It really seems as if there's a big difference if you're west or east of the atlantic.
I know of 4 places a front wheel rubs 
Front lip 
Fender lip
Wheel well at the a pillar
Inside wheel well when on full lock
So in general all cars used for racing with 7" or 8" wide wheels have to bend if not cut back the front lip and move their wheel well in front of the a pillars a bit back.
I don't understand why this isn't necessary in the US? 
Not being that lowered - don't think so
Not driven that hard - might be - but don't think so
If we west of the atlantic comply with TÜV and BMW rules we have to use differents offsets as the trackwidth may not be changed very much. But that doesn't explain why you don't have rubbing on the inner wheel wells on full lock with the high offsets you're running.




 

Edited February 3 by uai