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W163 2001 ML430 and 1999 ML320
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9 Posts
Discussion Starter #1
Hi everyone,
I have a 2001 Mercedes ML430 I'm preparing for RWC.
The previous owner replaced the standard 17" rims with 20" AMG rims which I intend to keep.
I don't know if any modifications were required to do this but as the 16" standard alloys on my ML320 have better tread on the tyres I want to switch these 16" rims over for the roadworthy certificate then replace the 20" rims again. Some people say you can go up in size but not down & others say you can go down by an inch or two.
As I said, the ML430 came out with 17" but I'm not sure if the 20" rims went on with alterations to anything or not.
Thank-you.
 

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2001 S430 · 4.3L V8
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5 Posts
My S430 currently has 20" on it and I just bought 16" to replace them. I actually ran into an issue today where I have to buy a whole set of bolts because I didn't realize the current bolts for the 20" are a lot shorter (they're aftermarket wheels) so I ordered a new set of 20pcs for $49 on Amazon. Other than that the back wheels are using spacers so that's something to look out for in yours. If the car originally uses 17" I don't see any issue with downsizing.

Waiting to see what other people say as well...
 

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w163 02 ML500 W210 97 E50Amg w202 99 C230K w124 - need more space, time to build again
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2,189 Posts
Hi everyone,
I have a 2001 Mercedes ML430 I'm preparing for RWC.
The previous owner replaced the standard 17" rims with 20" AMG rims which I intend to keep.
I don't know if any modifications were required to do this but as the 16" standard alloys on my ML320 have better tread on the tyres I want to switch these 16" rims over for the roadworthy certificate then replace the 20" rims again. Some people say you can go up in size but not down & others say you can go down by an inch or two.
As I said, the ML430 came out with 17" but I'm not sure if the 20" rims went on with alterations to anything or not.
Thank-you.
Your Q is "can I swap 20" rims for 16" rims"?
Answer is Yes.
You can go to any size from 16 up to whatever size, so long as the overall tire diameter meets the oem requirements.
With oversizing wheels and tire combos, you will throw off your speedometer reading calibration, and may produce ABS issues
If you stick with the oem wheel size chart info here, you will be fine
 

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E320/E250 Bluetec Ford F350 6.7l
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36,318 Posts
I can only hope ML430 doesn't have bigger brakes who would prevent installing 16"rims. Also good note on double checking the bolts.
 
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