Z4 E89 326M rear 19” alloy STILL required

[jenniferlouise]

I’m hoping that the forum members can again help me out… I’m looking for a single, rear 326M 19” 9J alloy wheel. BMW Part number 36117842136 (on back of wheel).

I’m having my current wheels refurbished in May and would rather refurbish an undamaged, unrepaired wheel instead of my current OSR which has two welds already.

Willing to take a wheel with some scuffs or a changed colour as it will be refurbished but must not be buckled, cracked or repaired please. I will be searching the internet too but history does not give me confidence with some less than honest sellers out there. And a new one is £650 which is currently out of reach…

I can collect locally and would prefer courier (my last wheel cost £15 to ship with Parcelforce if that helps).

I’ve attached an image to help, without wishing to offend the knowledge of this community

Thank you. A

 

[jimbo1958]

Hi Jennifer

Not sure if this is any good to you but I have a wheel with one crack that would obviously require welding. The crack is less than 25mm in length IIRC. It's otherwise in very good condition. You are welcome to the wheel free of charge if it's of any use to you as it's currently just taking up garage space. This wheel was donated to me several years ago by a forum member but I never had any of my 326ms crack on me in my five years of E89 ownership after ditching the runflats. I'm in Enfield.

Regards

Jim

 

[jenniferlouise]

Hi Jim, thank you kindly for your response. Ideally I am searching for a wheel with no current damage, as the wheel on the car has recently been repaired (2 welds) following similarly small cracks. My plan is to revert that one to a spare. The refurbishment company I met today did say BMW had a problem with their alloys between 2009-2014 but anything later is virtually bomb proof. I will see if the lovely people on here unearth an odd, lonely, unwanted 19” rear… if not, I may come back to you, thank you again for your message

 

[jimbo1958]

No problem Jennifer……good luck with your search.

 

[jenniferlouise]

Hi forum friends… still looking out for an undamaged replacement single rear 326 wheel

 

[Dave 2 dogs]

Hi jen
I have a set of these in the garage
I’m reluctant to split them because I was going to put them back on if I ever sold the car . I think this is what your looking for ? I don’t have any idea of a price. But obviously splitting the set makes it harder to do something for the rest . If this is what you want, come up with your best price and give me a shout

 

[jenniferlouise]

Thank you Dave I really appreciate your message. From research I think yours are 313M rather than 326M although others here will probably clarify. They are certainly different (the OE part number in the rear will give them away). There is an option I guess if buying all 4 from you, however for now I’ll try to get the odd one I’m looking for. Thank you again!

 

[Smartbear]

These wheels would give more peace of mind being of forged construction 8)
https://z4-forum.com/forum/viewtopic.php?p=1922162#p1922162
Rob

 

[ronk]

The wheels would give more peace of mind being of forged construction 8)
https://z4-forum.com/forum/viewtopic.php?p=1922162#p1922162
Rob

This sounds like a plan to me jenniferlouise.
You've then got new(ish) and good quality tyres and some stronger wheels along with your existing wheels to sell!

 

[Zforbes]

The wheels would give more peace of mind being of forged construction 8)
https://z4-forum.com/forum/viewtopic.php?p=1922162#p1922162
Rob

AFAIK the Ronal manufactured 326M wheels are forged, not many OEM wheels aren't.

I agree others are better though.

I've been fortunate enough to visit the FUCHS factory in Germany and watched the process, it's a wonder to me that most larger wider wheels don't crack more often as the wheel material is rolled back from the outer material of the front face.

 

[B21]

The wheels would give more peace of mind being of forged construction 8)
https://z4-forum.com/forum/viewtopic.php?p=1922162#p1922162
Rob

AFAIK the Ronal manufactured 326M wheels are forged, not many OEM wheels aren't.

I agree others are better though.

I've been fortunate enough to visit the FUCHS factory in Germany and watched the process, it's a wonder to me that most larger wider wheels don't crack more often as the wheel material is rolled back from the outer material of the front face.

Inchcape reckon the 326m are cast...

https://store.inchcape.co.uk/products/1x-bmw-genuine-alloy-wheel-19-m-double-spoke-326-rear-36117842136

 

[mr wilks]

The wheels would give more peace of mind being of forged construction 8)
https://z4-forum.com/forum/viewtopic.php?p=1922162#p1922162
Rob

AFAIK the Ronal manufactured 326M wheels are forged, not many OEM wheels aren't.

I agree others are better though.

I've been fortunate enough to visit the FUCHS factory in Germany and watched the process, it's a wonder to me that most larger wider wheels don't crack more often as the wheel material is rolled back from the outer material of the front face.

Inchcape reckon the 326m are cast...

https://store.inchcape.co.uk/products/1x-bmw-genuine-alloy-wheel-19-m-double-spoke-326-rear-36117842136

The 326s are not forged , safe to say the vast majority of OE ( Bmw ) wheels are cast , the forged generally only found on high end ( 7s + 8s ) or high performance models .

 

[Zforbes]

AFAIK the Ronal manufactured 326M wheels are forged, not many OEM wheels aren't.

I agree others are better though.

I've been fortunate enough to visit the FUCHS factory in Germany and watched the process, it's a wonder to me that most larger wider wheels don't crack more often as the wheel material is rolled back from the outer material of the front face.

Inchcape reckon the 326m are cast...

https://store.inchcape.co.uk/products/1x-bmw-genuine-alloy-wheel-19-m-double-spoke-326-rear-36117842136

The 326s are not forged , safe to say the vast majority of OE ( Bmw ) wheels are cast , the forged generally only found on high end ( 7s + 8s ) or high performance models .

Forged alloys are the vast majority of OEM wheels, cast is more expensive way of manufacturing with poorer grain flow but less expensive set up cost and why low volume manufacturers use it. 326m is a forged alloy with high volume production, don't know where you're getting info otherwise

 

[Smartbear]

Inchcape reckon the 326m are cast...

https://store.inchcape.co.uk/products/1x-bmw-genuine-alloy-wheel-19-m-double-spoke-326-rear-36117842136

The 326s are not forged , safe to say the vast majority of OE ( Bmw ) wheels are cast , the forged generally only found on high end ( 7s + 8s ) or high performance models .

Forged alloys are the vast majority of OEM wheels, cast is more expensive way of manufacturing with poorer grain flow but less expensive set up cost and why low volume manufacturers use it. 326m is a forged alloy with high volume production, don't know where you're getting info otherwise

Have you got a link to substantiate those claims? Most oem wheels are cast & not forged to my knowledge - if 326 wheels were forged & not cast then they wouldn’t crack every 5 minutes, look at the amount of welded ones for sale!
Rob

 

[Zforbes]

The 326s are not forged , safe to say the vast majority of OE ( Bmw ) wheels are cast , the forged generally only found on high end ( 7s + 8s ) or high performance models .

Forged alloys are the vast majority of OEM wheels, cast is more expensive way of manufacturing with poorer grain flow but less expensive set up cost and why low volume manufacturers use it. 326m is a forged alloy with high volume production, don't know where you're getting info otherwise

Have you got a link to substantiate those claims? Most oem wheels are cast & not forged to my knowledge - if 326 wheels were forged & not cast then they wouldn’t crack every 5 minutes, look at the amount of welded ones for sale!
Rob

My understanding is based on watching the manufacturing processes, it takes minutes to make a forged wheel, it's actually more simple than casting which is value for money for low volume but after initial set up less so.

A forged wheel in made from a billet of aluminium sawn to a length of about 8 to 10 inches thick but about 20 inches diameter, the wheel design is pre-form stamped, finished stamped then rolled using a beading process with roller and mandrel to make the inner wheel shape.

There are videos on YouTube showing from a distance the manufacturing process, you couldn't cast for the same cost, forging is the cheapest way to make mass produced wherls

 

[Zforbes]

The 326s are not forged , safe to say the vast majority of OE ( Bmw ) wheels are cast , the forged generally only found on high end ( 7s + 8s ) or high performance models .

Forged alloys are the vast majority of OEM wheels, cast is more expensive way of manufacturing with poorer grain flow but less expensive set up cost and why low volume manufacturers use it. 326m is a forged alloy with high volume production, don't know where you're getting info otherwise

Have you got a link to substantiate those claims? Most oem wheels are cast & not forged to my knowledge - if 326 wheels were forged & not cast then they wouldn’t crack every 5 minutes, look at the amount of welded ones for sale!
Rob

My understanding is based on watching the manufacturing processes, it takes minutes to make a forged wheel, it's actually more simple than casting which is value for money for low volume but after initial set up less so.

A forged wheel in made from a billet of aluminium sawn to a length of about 8 to 10 inches thick but about 20 inches diameter, the wheel design is pre-form stamped, finished stamped then rolled using a beading process with roller and mandrel to make the inner wheel shape.

There are videos on YouTube showing from a distance the manufacturing process, you couldn't cast for the same cost, forging is the cheapest way to make mass produced wherls

 

[Smartbear]

Here’s the easy way to tell if a wheel’s been cast or forged, I’ve had 326 wheels myself & know they don’t have engraved markings on the rear as per this link, thus they are cast.
I’ve also worked in a foundry making aluminium sand & die castings so know a little about the process
https://www.6post.com/forums/showthread.php?t=1733595
Rob

 

[Smartbear]

This link also explains why forged wheels are more expensive to produce than cast wheels.
https://wheelzine.com/forged-wheels-vs-cast-wheels
Rob

 

[Zforbes]

The forging die has the imprint of the part number, not sure what you're saying with the example, my work is the use of forged aluminium but in aerospace hence why I've been to Otto Fuchs and witnessed the manufacturing processes of the wheels they produce and having the understanding of the manufacturing processes. It is much simpler for forging manufacturing than cast to create the shape then finish turn and mill the wheel profile. Casting is rough as although finished using the same principles

 

[Zforbes]

Your link agrees with my comments, low volume cast. High volume forged is cheaper