Anybody explain this, winter steel wheels.

John Jones Jr

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I'm mulling over my next project and I'm considering using R129 steel wheels which are normally fitted in conjunction with winter tyres, according to M-B themselves.

Now the normal early R129 alloy wheel is 8Jx16 H2 ET34, the steel wheel is 8Jx16 H2 ET35 and both take the same tyre size 225/55/16.

What I want to know is why M-B added a footnote to the wheel spec, stating that steel wheel is ''For subsequence installation of winter tyres only''. Is there some inherent problem I'm unaware of if I fit Summer tyres to the steel wheels?

Any ideas or input greatly received.
 
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John Jones Jr

John Jones Jr

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It wouldn't be anything to do with superior brake cooling that alloy the design might offer?
 
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Sp!ke

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Steel will dissipate heat faster I would have thought.

[edit] just checked and I am wrong.
 
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John Jones Jr

John Jones Jr

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Steel will dissipate heat faster I would have thought.

[edit] just checked and I am wrong.

I recall being told that the 15 hole alloy was specifically designed or better designed to aid brake cooling?
 

BTB 500

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My guess would be that the steel wheels aren't quite as stiff/rigid under cornering loads.

That's not to say that steel wheels can't be made for high-speed applications ... just that these specific rims were designed with the lower speeds associated with winter driving & tyres in mind.
 
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John Jones Jr

John Jones Jr

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BTB500, you & Sp!ke could be on the money - speed rating. If it's accepted that steel wheels in the case of the R129 are only used for Winter tyres well they'll have a lower speed rating than Summer tyres. Thus, it may not be the wheel as such but the tyre itself?

Edit. On reflection my assumption doesn't make sense, as a Winter tyre has the speed rating denoted on it just like a Summer.
 
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mersum1es

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My guess is that steels are cheaper and much more resistant to harsh winter road conditions than lacquer of the aluminum alloys.
 
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John Jones Jr

John Jones Jr

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My guess is that steels are cheaper and much more resistant to harsh winter road conditions than lacquer of the aluminum alloys.

Agree but why does M-B state they're only suitable for Winter tyres?


P.s. Primera P11 eh? One of the nicest handling & steering FWD cars I ever drove.
 

mersum1es

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Agree but why does M-B state they're only suitable for Winter tyres?


P.s. Primera P11 eh? One of the nicest handling & steering FWD cars I ever drove.


Premium car does not look good with cheapo wheels?

Yep, P11 :thumb: If only it has 2.0L engine... nowadays it's not on the road use (cancelled insurance fees too), waiting if I sell my W210 but it looks like I need to sell Primera instead...
 

bolide

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My guess would be that the steel wheels aren't quite as stiff/rigid under cornering loads.

You might well be right. W124 Estate steel wheels are much thicker & heavier than saloon wheels. They have a little Twheel badge

I assume a Mercedes test-driver had a wheel failure at full chat on the Nurburgring and a memo was sent

Nick Froome
 
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John Jones Jr

John Jones Jr

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W124 Estate steel wheels are much thicker & heavier than saloon wheels. They have a little Twheel badge

Nick Froome

Very interesting, I'd never have suspected that. :thumb:
 

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