OEM v's Aftermarket Wheels (what's the difference) - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

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#1 Old 08-06-2015
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OEM v's Aftermarket Wheels (what's the difference)

Hi All,

So, I had my wheels refurbished, to get rid of some kerbing marks... and ever since I did this I have a wobble....

I've had the wheels balanced 4 times at 4 different garages, most recently today at a mercedes dealership... and they all balanced them saying they were between 10 - 30g's out... (don't get me started on how all of these machines seem to read different, when they should all be calibrated!).

Anyway, nothing is working, I still get this strange shimmy, not really through the steering, more through my seat.... and more bizarrely, it seems to be in waves, in that you feel it for 3 seconds then it disappears for 1 second, then back for 3 then gone for 1 etc... most bizzare

Anyway the latest story, (from the guy at the merc garage), is that my wheel is 'out of round' on the front drivers side.... I've had the suspension checked twice at 2 different garages (just in case), all reported fine.

So I've had enough of this and need a new set of alloys (finally to the question the thread is titled as)

So a single AMG alloy from various locations is about £500... so a set will be about £2000..

An aftermarket Alloy that 'looks' like an AMG rim, I can get a set of 4 for anything from £450 - £1000... so the fact that I get get a set for the price of a single rim from Mercedes begs the question, what's the difference?
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#2 Old 08-06-2015
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Aftermarket Versus OEM Car Parts: Is the Extra Cost Worth It? -- Edmunds.com

The truth about replica wheels (and why OEM is better) | eBay

What Is The Difference Between OEM And Aftermarket Auto Parts? - Car Talk - Nigeria


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#3 Old 08-06-2015
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Originally Posted by Swagman View Post
Hi All,

So, I had my wheels refurbished, to get rid of some kerbing marks... and ever since I did this I have a wobble....

I've had the wheels balanced 4 times at 4 different garages, most recently today at a mercedes dealership... and they all balanced them saying they were between 10 - 30g's out... (don't get me started on how all of these machines seem to read different, when they should all be calibrated!).

Anyway, nothing is working, I still get this strange shimmy, not really through the steering, more through my seat.... and more bizarrely, it seems to be in waves, in that you feel it for 3 seconds then it disappears for 1 second, then back for 3 then gone for 1 etc... most bizzar

Anyway the latest story, (from the guy at the merc garage), is that my wheel is 'out of round' on the front drivers side.... I've had the suspension checked twice at 2 different garages (just in case), all reported fine.

So I've had enough of this and need a new set of alloys (finally to the question the thread is titled as)

So a single AMG alloy from various locations is about £500... so a set will be about £2000..

An aftermarket Alloy that 'looks' like an AMG rim, I can get a set of 4 for anything from £450 - £1000... so the fact that I get get a set for the price of a single rim from Mercedes begs the question, what's the difference?
They wont be called AMG for a start if its on the rim more like AME as such .
Quality wont be the same .
And possible if you put one on only it may put the alignment out .
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#4 Old 08-06-2015
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If the one wheel is out refit to the rear of car and see if the shimmy / strange sensations moves to the rear .
If so its to do with wheel and not your car of sorts .
And yes i know the wheel / tyre is different size but its just temp to see .

Or borrow some spare alloys
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#5 Old 08-06-2015
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Originally Posted by Delucas View Post
If the one wheel is out refit to the rear of car and see if the shimmy / strange sensations moves to the rear .
If so its to do with wheel and not your car of sorts .
And yes i know the wheel / tyre is different size but its just temp to see .

Or borrow some spare alloys
I was hoping the merc garage today, would have fit a 'spare' set of alloys, to see if the 'shimmy' disappeared so I could categorically say that buying a new set of alloys would work... but alas, even though I suggested it, they didn't...
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#6 Old 08-06-2015
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Buy them in Germany.
This German MB dealer AMG Styling V / 5 light-alloy wheel Mercedes-Benz SLK R171 deliver a AMG V 18"inch rim for 496 euro which is some £350 or £1400 for a set. There will be shipping costs but there are not too high, I guess something like 50 euro. Still a lot of money but you'll be saving some £600 and have the real thing.
BTW I'm in no way affiliated with these guys...........
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#7 Old 08-06-2015
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Or ebay
As theres many single genuine alloys out there .
Look for a new one with or one no damage as such .
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#8 Old 08-06-2015
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Originally Posted by Swagman View Post
I was hoping the merc garage today, would have fit a 'spare' set of alloys, to see if the 'shimmy' disappeared so I could categorically say that buying a new set of alloys would work... but alas, even though I suggested it, they didn't...

You only need two as such
Get the direction of tyre rotation correct and away you go .

You should easily see a buckled alloy wheel even left on the vehicle .
With a keen eye .
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When I recently went to replace my wheel I found this article to be helpful in understanding the difference.

OEM Vs. Aftermarket Wheels - What You Need to Know

It compares the benefits and disadvantages of each type of wheel.
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#10 Old 11-30-2016
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Originally Posted by OBJ711 View Post
When I recently went to replace my wheel I found this article to be helpful in understanding the difference.

OEM Vs. Aftermarket Wheels - What You Need to Know

It compares the benefits and disadvantages of each type of wheel.
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#11 Old 11-30-2016
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Originally Posted by Swagman View Post
So, I had my wheels refurbished, to get rid of some kerbing marks... and ever since I did this I have a wobble....
Sorry to hear you're having problems.

Usually, if you get that kind of vibration happening in waves, it means that at least two wheel/tire assemblies are out of balance. The 'wave' indicates when they're going in and out of phase with each other as they roll.

I always prefer the manufacturer's wheels, personally, particularly for high-end brands like Mercedes-Benz.

I had a similar situation when I fitted a set of refurbished AMG wheels to my car. At surface street and local expressway speeds (up to 60mph) they felt fine, but at speeds on the highway (65 to 80 mph) a serious vibration appeared and disappeared in waves.

I immediately thought it might be one or two of the wheels out of true, but an out of true wheel ultimately won't balance on a 'rolling road' type of dynamic tire balancer. I brought it back into the tire shop for a thorough recheck.

They found that two of the wheel assemblies were 25g or more out of balance ... way more than an acceptable amount. They also unmounted and remounted one of the tires as it seemed either the tire was either mounted incorrectly or malformed, it had a small bump in it when spun. It seems to have been the former because after they did that and rebalanced all wheels and tires, the vibration disappeared.

It was sloppy work on the part of a former employee, who had already been let go. "Too many returns when he was running the tire balancing machine. He wouldn't pay attention..."

I hope your problem is solved to your satisfaction soon.

BTW, for those in the USA: I bought my 17" AMG rims from Auto Rim Shop (home). They're the correct sizing and offsets from the SLK280/350 Sport kit for 2006 to 2009. The refurbishment was done beautifully, they look brand new and run perfectly true.

G
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Originally Posted by OBJ711 View Post
When I recently went to replace my wheel I found this article to be helpful in understanding the difference.

OEM Vs. Aftermarket Wheels - What You Need to Know

It compares the benefits and disadvantages of each type of wheel.
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