GL Class (X166) 2013-2015 after facelift became GLS (X166)

Know the weight of these wheels?

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Old May 16, 2018 | 12:11 AM
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Know the weight of these wheels?

Looking for the weight of these wheels:

A16640132007X21 21" AMG Multi-Spoke (off and on standard for GL and GLS500 in some countries...current the cold weather wheel and tire package wheel)
A16640125027X23 21" AMG 5-Twin-Spoke (Standard 550 Wheel With Night Package...weight is probably identical to the 550 non-night pack AMG wheel)
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Old May 16, 2018 | 10:27 PM
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Originally Posted by Plutoe
Well Biff you can use any bath room scale to accomplish that task
If I wanted childish commentary I would have posted on the Sesame Street forum
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Old May 19, 2018 | 08:31 AM
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on GLC300 #2, a 2022 CPO purchased b/c I really dislike the X254's UI (GL350 before those)
I'm curious why you ask. The trucks weigh 5300+ unladen, 21" assemblies could easily exceed 70 lbs each. This isn't the Miata forum where I read how owners obsess over cutting excess grams and, particularly, unsprung weight with tangible results. If you're interested in less unsprung weight on a GL you may stand alone here among a crowd of bigger and blingy-er, but generally you need to go down, not up, in wheel size.
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Old May 19, 2018 | 01:37 PM
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Originally Posted by mustbebenz
I'm curious why you ask. The trucks weigh 5300+ unladen, 21" assemblies could easily exceed 70 lbs each. This isn't the Miata forum where I read how owners obsess over cutting excess grams and, particularly, unsprung weight with tangible results. If you're interested in less unsprung weight on a GL you may stand alone here among a crowd of bigger and blingy-er, but generally you need to go down, not up, in wheel size.
I have an opportunity to get either wheel for my ride and I like them equally so using weight as a possible differentiator. It is more than just unsprung weight, wheel and tire assemblies have rotational inertia and that rotational inertia can have an impact on acceleration. Acceleration is all about torque and the higher rotational inertia the more torque it takes to overcome. Ideally a schematic drawing of said wheels and an ability to determine the distribution of mass within those wheels would be most helpful...but doubt that will happen. Closest thing I have found is part companies listing shipping weights of these wheels (not overly confident in their assessment). Correlating a couple of them it looks like the multi-spoke design is around a kilo to a kilo and a half less per wheel (2.2-3.3 lbs). Not knowing the distribution of mass within the wheel that difference could make an equivalent (static) mass in the range of 6-12 kilos (14-26lbs) which isn't a lot...need a reduction in the 40 kilo area at minimum to start making any real material impact on acceleration with a vehicle of this mass.

I am former racer and former Engineer in the auto industry (5+ years with Mercedes) so I pay more attention to things like this than most.

Last edited by mercup; May 19, 2018 at 01:40 PM.
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Old May 19, 2018 | 03:05 PM
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It's an oem wheel. You're a MB engineer. Shouldn't we be asking you what the wheel weight is?
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Old May 19, 2018 | 03:32 PM
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My sincere wish is Mercedes would disclose ALL OEM wheel weights. It would be VERY helpful when deciding. I’d gladly pay more for less unsprung weight. Right now with my AMGs, I can only find the wheels offered are standard or forged. No information about weight.
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Old May 19, 2018 | 11:04 PM
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Originally Posted by Mike450
It's an oem wheel. You're a MB engineer. Shouldn't we be asking you what the wheel weight is?
You evidently missed the word "Former" in my prior posting...
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Old May 19, 2018 | 11:09 PM
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Originally Posted by Jan AMG
My sincere wish is Mercedes would disclose ALL OEM wheel weights. It would be VERY helpful when deciding. I’d gladly pay more for less unsprung weight. Right now with my AMGs, I can only find the wheels offered are standard or forged. No information about weight.
I agree 100%!

This probably won't help much, but here is the site I found to be the most descriptive about Merc wheels:
https://www.mercedes-benz-bremen.de/...n/X166/lm.html

And here are two sites that list a weight for a particular part; (might be close)
http://mbspecialist.com/mercedes_web...6640125027X23/
https://www.online-teile.com/mercede...eichenrad.html

Some German in there, but Google Translate can be very handy for that...
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Old May 21, 2018 | 06:45 AM
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on GLC300 #2, a 2022 CPO purchased b/c I really dislike the X254's UI (GL350 before those)
To our OP: I'm familiar with your points, but this is a GL and not exactly a study in efficiencies or hugely presponsive to minor improvement to just one potential such detail (because it's so huge unlike, say, a Miata). I'm quite seslnsitive dynamically and readily notice differences between my smaller winter assemblies reduced both in diameter and tire size compared to the stock sets (though for reasons different than yours) on both my current cars.
I respect your focus as intellectual involvement in your decision, I frequently get deep into data within my lay person's limits, and my asking gave you a nice chance to flex the keyboard.
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Old May 22, 2018 | 06:33 PM
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Originally Posted by Mike450
It's an oem wheel. You're a MB engineer. Shouldn't we be asking you what the wheel weight is?
Ouch!! 🔥🔥🔥🔥
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Old May 22, 2018 | 06:48 PM
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Originally Posted by Osmile01
Ouch!! 🔥🔥🔥🔥
Ah yes...people's inability to comprehend sentences is to be celebrated!
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Old May 22, 2018 | 08:12 PM
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Originally Posted by mercup
Ah yes...people's inability to comprehend sentences is to be celebrated!
From one engineer to another, I assumed such a basic piece of oem info could have been obtained from a former colleague.
My mistake. Dont let me get in the way of your celebration though.
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