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PS4S Wrong Size...? $1,100 wasted?

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Old 04-17-2020, 05:40 PM
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2015 (Final-Year) Fully-Loaded W204 M156 Custom Mercedes-Benz Designo C63 AMG Edition 507 Coupe
Angry PS4S Wrong Size...? $1,100 wasted?

Did I just spend $1,100 on tires that can't be returned or fit the car

2015 W204 C63 AMG Edition 507 coupe. Stock 19 inch wheels. Stock suspension/ride height.
Michelin PS4S
Front: 245/40ZR19 (98Y)
Rear: 275/40ZR19 (105Y)

The MB tech told me they don't rotate and contact the front struts. I searched the forums before purchasing and found that others are using the same setup. Beyond frustrating. What did I do wrong?




Old 04-17-2020, 05:55 PM
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It is the /40 profile way to high, you can run 275 and 245 but much lower profiles, those tires will probably never work, that is like SUV sidewall these days.

correct size would have been 275/30-19 and 245/35-19

Last edited by roadkillrob; 04-17-2020 at 05:57 PM.
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Old 04-17-2020, 06:00 PM
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Here is a comparison between the correct size and what you have for the rears, it is 2.2 inches too tall.

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Old 04-17-2020, 06:14 PM
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2010 C63 AMG
Originally Posted by JumboNate
What did I do wrong?
You ordered the wrong sizes.
Originally Posted by roadkillrob
correct size would have been 275/30-19 and 245/35-19

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Old 04-17-2020, 06:26 PM
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2015 (Final-Year) Fully-Loaded W204 M156 Custom Mercedes-Benz Designo C63 AMG Edition 507 Coupe
f-ing unreal
Old 04-17-2020, 06:41 PM
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2010 C63 AMG
Get a custom lift kit for that bad boy and run them monster truck tires
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Old 04-17-2020, 07:17 PM
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Ouch. I know the feeling, but you can sell them somewhere. They are still great tires for somebody. Roadkillrob has the correct set up for you.
Old 04-17-2020, 08:00 PM
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That sucks they are great tyres so you should be able to get rid of them ebay or craigslist perhaps or even ask friends
Old 04-17-2020, 09:33 PM
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Try a 5 or 10mm spacer
Old 04-17-2020, 10:02 PM
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2015 C63 507 edition
Anyone know if I can run 245/35/19 and 275/30/19 on stock 507 wheels but with 12mm and 15mm spacers aswell as being lowered on H&R springs? or should I stay safe with 265/30/19 on the rears
Old 04-18-2020, 12:28 AM
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Originally Posted by Elyas Mohammed
Anyone know if I can run 245/35/19 and 275/30/19 on stock 507 wheels but with 12mm and 15mm spacers aswell as being lowered on H&R springs? or should I stay safe with 265/30/19 on the rears
I'd stick with the 265s out back if you're lowered.
Old 04-18-2020, 11:10 AM
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Yea I ordered 265/35/19 for the rear to try to fill in that 1” gap and those rubbed on the fender if i had any passenger in the back. Learned not to make that mistake again.

Take those tires off and post em for sale
Old 04-18-2020, 08:31 PM
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Will 275s fit on the stock 18" setup? I thought 265 was the widest you could go?
Old 04-18-2020, 08:38 PM
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Originally Posted by skullbox15
Will 275s fit on the stock 18" setup? I thought 265 was the widest you could go?
I was running 275s with spacers and I got a slight scrub when i would hit bumps at 60mph+ so i sized back down to a 265 especially since im getting H&R springs soon.. Never had issues with the 275s and no spacers tho.
Old 04-19-2020, 08:09 AM
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I'm running 275's on stock 18"x9" with no rubbing at all.
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Old 04-19-2020, 09:23 AM
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2014 C63 AMG 507 Edition
Originally Posted by C63AMGeez
Yea I ordered 265/35/19 for the rear to try to fill in that 1” gap and those rubbed on the fender if i had any passenger in the back. Learned not to make that mistake again.

Take those tires off and post em for sale
good to know. I thought about going to a 265/35/19 for the rear to also get rid of that gap.. guess I’ll be staying at a 30 lol.
Why do they put a “fatter” tire up front? Shouldn’t it be the other way around? 30 up front and 35 in the rear. Get some more meat back there?

Also has anyone tried 275/30/19 on H&R springs?


Old 04-19-2020, 07:02 PM
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How do you order the wrong tires? If discount tire and tire rack show you the sizes needed?
Old 04-19-2020, 07:11 PM
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Originally Posted by Black_Mercedes
How do you order the wrong tires? If discount tire and tire rack show you the sizes needed?
He was going from stock 235/255 to 245/275 and ****'ed up the aspect ratios. DTD and TR only show you the OEM sizes based on rim diameter.
Old 04-19-2020, 07:24 PM
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Originally Posted by Cwagon
I'm running 275's on stock 18"x9" with no rubbing at all.
507 wheels are 19 not 18
Old 04-19-2020, 07:30 PM
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2000 Acura NSX, 2012 C63 P31 (gone and not forgotten), 2015 C63 507
Assuming I already have H&R springs (can't see any markings but car looks dropped)

I have a 2015 507 coupe as well.

Don't wanna add spacers

Can I go 275/30/19 or stick with 265/30 to be safe? (Currently on 255)

Next the front should be 245/30 or 245/35 to correlate to the rear?
Old 04-19-2020, 07:44 PM
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Originally Posted by DARRYL D
Why do they put a “fatter” tire up front? Shouldn’t it be the other way around? 30 up front and 35 in the rear. Get some more meat back there?
30 and 35 is the side wall profile of the tyre, 255 and 275 is the width of the tyre, when you have 2 different tyre widths you also stagger the profile to get the same rolling diameter front and rear.
So 30% of a 275 tyre width will give you the same rolling diameter as 35% of a 255 tyre.
Old 04-19-2020, 11:54 PM
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2013 W204 C63 AMG P31 Estate wagon
Originally Posted by skullbox15
Will 275s fit on the stock 18" setup? I thought 265 was the widest you could go?
Originally Posted by 95gsrturbo
507 wheels are 19 not 18
I know 507's have 19"s, was answering skullbox15's question.
Old 04-21-2020, 05:34 AM
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2015 C63 507 edition
Another question I have is if I can go up a size in the rear to 265 but keep the fronts at stock 235. Any downsides to this? (Cant seem to find Vredestein Ultrac Vorti in a 245/35/19 anywhere locally and don't wanna pay duties if shipped from USA otherwise I would size up the fronts to a 245)
Old 04-21-2020, 06:26 AM
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Originally Posted by Elyas Mohammed
Another question I have is if I can go up a size in the rear to 265 but keep the fronts at stock 235. Any downsides to this? (Cant seem to find Vredestein Ultrac Vorti in a 245/35/19 anywhere locally and don't wanna pay duties if shipped from USA otherwise I would size up the fronts to a 245)
I run 18 x 8.5 & 9" with 235 fronts with 275 rears and no downside that I can notice.
No ABS or dash lights and have been running this setup for nearly 2 years now.
One upside is the rears hook up better than the 255 that were on it when I bought the car.
The wheels are E400 wheels that are almost identical offsets to C63 18's but with 8.5" front, up from C63 8".
So 265 rears should be fine.
Old 04-23-2020, 02:12 AM
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12-P31 C63 Coupe- 19-GLC 63 S COUPE -18-911 TURBO S 19 AMG GTR COUPE
Maybe

I do know if you have a contact at somewhere like a discount tire or a vendor who sells your mistake tires. I have seen them able to return tires a get a correct size. I personally have tried a few different tires didn’t care for them on some of my rides and swapped them out, that includes profiles and diameter. Hope this helps
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