C63/C63S AMG
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P4S's (275x19 ; 305x20) on a Coupe

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Old Aug 31, 2018 | 11:58 AM
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HarrySeaward's Avatar
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2018 C63S Coupe
P4S's (275x19 ; 305x20) on a Coupe

This topic has been beaten to death, but I figured I would post a couple pictures and some information.

I prefer the way the car handles now much more than the way it did with the stock Super Sports (had less than 6K miles on them at time of swap).

Actual speed of car by GPS and Radar is roughly 2 mph faster than what speedometer is reading.


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Old Aug 31, 2018 | 01:25 PM
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C63S AMG Coupe
I disagree that the topic has been beaten to death. I am always looking for a better picture to illustrate the visual impact of the wider tire. Perhaps a rear shot would do that? I dunno.
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Old Aug 31, 2018 | 03:34 PM
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c63s coupe


295/30/20 p4s
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Old Aug 31, 2018 | 09:10 PM
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2024 X5 M60i, 2018 C63S Coupe (sold)
Both the stock 19" and 20" wheels are 10.5" wide in the rear. Most (all?) of the people that have installed 305s have been running the 20" wheels. Can anyone see why they wouldn't also work on the 19" wheels (since they are the same width)? My Contis are about done for and I'm looking to upgrade to 305 P4S... but I have the stock 19" front/rear wheels rather than the 19"/20" wheels.
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Old Sep 1, 2018 | 06:12 PM
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Originally Posted by HarrySeaward
This topic has been beaten to death, but I figured I would post a couple pictures and some information.

I prefer the way the car handles now much more than the way it did with the stock Super Sports (had less than 6K miles on them at time of swap).

Actual speed of car by GPS and Radar is roughly 2 mph faster than what speedometer is reading.


Wow, I didn't realize you could go that wide on the stock rims?
Are you running stock suspension?

Just curious, what is it you like about the set up vs your original tire size?

Traction on acceleration? Handling grip? Turn In? Overall Stability?
And how is the ride?

Your input is appreciated.
Thanks! :-)
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Old Sep 1, 2018 | 10:27 PM
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2018 C63S Coupe
Car is completely stock.

It's probably all in my head, but the traction on acceleration and hard banking seems significantly better. Don't really see how 20 mm of rubber can make that much of a difference, but the car just feels much more predictable.
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Old Sep 1, 2018 | 10:43 PM
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Thanks Mate! :-)
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Old Sep 1, 2018 | 10:47 PM
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One more Question:
What kind of tire pressure are you running?
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