C63 AMG (W204) 2008 - 2015

What size it's the best!?

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Old 01-09-2014, 12:42 PM
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Arrow What size it's the best!?

What size it's the best for the wheels one the racetrack, 18" or 19"?
Old 01-09-2014, 12:45 PM
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2012 C63 AMG Black Series
18" .. Ideally an 18x10 wheel in the rear and 18x8.5 in the front. 19" feel slower but thats just my experience. Plus running a thicker tire will be better for grip.

Last edited by VaclavSV; 01-09-2014 at 12:48 PM.
Old 01-09-2014, 12:49 PM
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Sorry for my english but what mean thicker tire?

I found some wheels with this size, what you think?

2 X 8.5 X 18" 5X112 ET45 ALLOY WHEELS

2 X 9.5 X 18" 5X112 ET45 ALLOY WHEELS

Last edited by prindone; 01-09-2014 at 01:02 PM.
Old 01-09-2014, 02:17 PM
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'20 GLC300 SUV
18 IMO. Lighter and you can still get wide rubber on 18" wheels.
Old 01-09-2014, 02:21 PM
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ok, so whats size of tire on these wheels?
Old 01-09-2014, 02:53 PM
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Over the past decade quite a few car mags (mostly euro) that I've seen have run track tests on same brand, same-width, different series tires for best lap times. I don't recall a single test where anything lower than a 40-series has delivered the best time. Usually it's 45- or 50-series that yield the fastest laps.
Old 01-09-2014, 02:54 PM
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Originally Posted by prindone
Sorry for my english but what mean thicker tire?

I found some wheels with this size, what you think?

2 X 8.5 X 18" 5X112 ET45 ALLOY WHEELS

2 X 9.5 X 18" 5X112 ET45 ALLOY WHEELS
By thicker I meant Series 40+ like mentioned above
Old 01-09-2014, 03:04 PM
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Originally Posted by prindone
ok, so whats size of tire on these wheels?
You can go as wide as 265 or 275 in the back. You can get exact tire dimensions from www.tirerack.com.
Old 01-09-2014, 03:14 PM
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What's the best size? I prefer a 34 D, unless she's thicker with a little junk in the truck then I prefer a DD
Old 01-09-2014, 03:15 PM
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Originally Posted by VaclavSV
By thicker I meant Series 40+ like mentioned above
By thicker I meant curvier....
Old 01-09-2014, 03:20 PM
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Wow, its really big as usualy for the front its 235 and 255 fir the rear

So you say 265 or 275 for the rear and how much for the front?
When you say series 40 or + you mean 265/40or +/ 18?

for the wheels i want to buy, the salers say to me that maybe i have to put some spacers as its ET45, doenst matter the spacer for race use?

Thanks guys but not easy for me in English!
Old 01-09-2014, 05:09 PM
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Originally Posted by prindone
Wow, its really big as usualy for the front its 235 and 255 fir the rear

So you say 265 or 275 for the rear and how much for the front?
When you say series 40 or + you mean 265/40or +/ 18?

for the wheels i want to buy, the salers say to me that maybe i have to put some spacers as its ET45, doenst matter the spacer for race use?

Thanks guys but not easy for me in English!
Yeah 255 is actually really small (as far as rear tires go) for a car with 450+ horsepower.

I would recommend the following:

Front: 245/40/18
Rear: 265/35/18
Old 01-09-2014, 05:21 PM
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It will not tuch as the car will be more down with the coilovers?
Old 01-09-2014, 05:57 PM
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Originally Posted by bhamg
Over the past decade quite a few car mags (mostly euro) that I've seen have run track tests on same brand, same-width, different series tires for best lap times. I don't recall a single test where anything lower than a 40-series has delivered the best time. Usually it's 45- or 50-series that yield the fastest laps.

Interesting observation.
Old 01-09-2014, 06:03 PM
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Originally Posted by prindone
Wow, its really big as usualy for the front its 235 and 255 fir the rear

So you say 265 or 275 for the rear and how much for the front?
When you say series 40 or + you mean 265/40or +/ 18?

for the wheels i want to buy, the salers say to me that maybe i have to put some spacers as its ET45, doenst matter the spacer for race use?

Thanks guys but not easy for me in English!
And about the speacers, doesnt matter?
Old 01-10-2014, 09:06 AM
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ET +45 will be too aggressive for the rear and spacers will just make it worse and you will rub the fender lip. A 255/35/18 might just fit. You can run a 275/35/18 on the rear but will need an ET between +52 and +55.
Old 01-10-2014, 09:32 AM
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What ET have we on original?
Old 01-10-2014, 05:34 PM
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
OEM front ET +45 and rear ET +54.
Old 01-10-2014, 05:36 PM
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Thx mate!
Old 01-10-2014, 06:01 PM
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Originally Posted by Mort
ET +45 will be too aggressive for the rear and spacers will just make it worse and you will rub the fender lip. A 255/35/18 might just fit. You can run a 275/35/18 on the rear but will need an ET between +52 and +55.
Yes difficult to found some wheels for this Size of tire:-(
Old 01-10-2014, 09:30 PM
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Originally Posted by Mort
ET +45 will be too aggressive for the rear and spacers will just make it worse and you will rub the fender lip. A 255/35/18 might just fit. You can run a 275/35/18 on the rear but will need an ET between +52 and +55.
Mort, is it possible to run 285 at the back at all? Thanks.
Old 01-10-2014, 11:35 PM
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I have run 245/275 and 255/285. 245/275 can be run as daily driver.
I run 255/285 on the track. 255/285 will rub on occasionally on hi way and city streets, also when you have passengers.
Old 01-11-2014, 03:05 AM
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Originally Posted by jrcart
What's the best size? I prefer a 34 D, unless she's thicker with a little junk in the truck then I prefer a DD
Yeah I'll take one of them please
Old 01-11-2014, 10:09 AM
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Originally Posted by Karl901
I have run 245/275 and 255/285. 245/275 can be run as daily driver.
I run 255/285 on the track. 255/285 will rub on occasionally on hi way and city streets, also when you have passengers.
Thank you. How was the handling? Did you notice any signficant change in handling - more pronounced under or oversteer? Also, did you feel there is significantly more grip? Am looking for aftermarket wheels at the moment and thinking about tire and rim width.

Prindone - sorry if I am highjacking your thread, was going to create a separate thread on this, but think this will be relevant for you too.

Last edited by MicheleC; 01-11-2014 at 10:11 AM.
Old 01-11-2014, 11:16 AM
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The forum is here for that !;-)


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