IdTamer

Hello All,

Hopefully someone can help.

After searching around on the forum I am still unsure what size I need. I have a 2017 coupe with the factory 19" front and rear (not 20" like apparently everyone else), 9" front and 10.5" rear. I would like the widest tires with the most sidewall to maintain ride quality and grip. With my eurocharge tune the back stock tires are all over the place. What tires are the largest I can fit without spacers and without lowering? I would like them as flush as possible with no poke. I will be buying the Michelin PS4S for sure.

Thanks in advance!

untamedd

IdTamer

I was thinking 305 but not sure about 305/35/19 or 305/30/19

Thanks!

untamedd

IdTamer

Nobody seems to have 19 rears

Rubpau

OP, I'm also in the process of buying michelin 4s for my coupe. From my research, it seems like 265/35 R19 and 295/30 R 19 is a safe bet. Although i've see 305s mentioned. Im personally just going with the 265F and 295 rear. I also am running all 19 inch wheels, all stock with no lowering.

Just curious, where will you be buying the tires from?

IdTamer

I bought mine from Discount TIre - they had them ready the next day and installed them fast.


So I figured out that my car came with the 770 package, as below:



I decided to go with the following setup:

Front:
Pilot Sport 4S
265 /35 R19 98Y XL BSW

Rear:
Pilot Sport 4S
305 /30 R19 102Y XL BSW

They fit perfectly, and they do not spin at all unless it is raining, even with the Eurocharge tune. Totally changes the ride! They were a little stiff at first, but once I lowered the PSI to factory specs they handled perfectly. Below are some pictures, no poke/rubbing/etc.

Before:






After:






Ride stiff as hell:



Much better

Rubpau

how does it feel? (if it's heavier steering with the increased width)? any pros and cons with the increased tire size besides extra grip? do you have a little bit variation with the speedometer? Looks Great! I might go with those two sizes instead that you have chosen. We got the same wheels and 19 inches all around.

IdTamer

They feel great, no problems as far as I can see. I have not noticed any variation in the speedometer, except maybe the 0-60 is faster

Than again I have not really tried to measure any variation, it may be off by 1-2 MPH. Tires are much grippier with lower PSI, but if you want it a little firmer you can always add more air.

Good luck!

Rubpau

I'm glad to hear! im still debating to go with a 295 rear or the 305 rear that you went with, Im choosing 265 for the fronts...trying to figure out which is the better ratio lol

Clamelken2

How is the ride? Would you suggest going 19/20 for a c63 non-a coupe?

i have 18s all around Michelin PS4S

DaveSummer

Did you end up installing 295s on the rear and 265s up front? Any rubbing issue?

BlackScholes

Hi friend. 2019 c63s coupe here. Our coupes are different wheel well size than sedans, so be careful what you read (we can handle bigger than the sedan can). Max I can fit (literally, I tried to go slightly bigger) is:

- Front 265/35 19inch
- Rear 305/30 20inch

These do not scrape at all, even when driven hard. The tire guys were scared to put them on at first as they didn't think they'd fit, but they fit perfectly. And they completely fill the well when looking at the car from the outside. I have Pilot Super Sport 4s. I can take a picture for you if you need it, DM me. cc @DaveSummer @Rubpau

Jimmy_c63s

265 were meant for our car's fronts and 295 for rears. The old brochures even had 265's

RavenM6

That’s the same setup I ran on my ‘21 coupe. On my ‘23, I went with the same 305/30/20 rears and up a size on the fronts to 275/35/19. No rubbing or scraping whatsoever.

Jimmy_c63s

So perfect... the way it was meant to be. Why did they give us such skinny tires?

RavenM6

Thanks bro. No idea why they skimped on the tire sizes. At the very least they should’ve been fitted with 265 fronts / 295 rears.