As above there doesn’t seem to be much on the search (maybe 3 threads) some people have 18’s & 20’s or the wheels are 8.5”

Secondly can you run an 19x9.5 with a 255/35 front?

If any of these questions also need anything other than stock alignment please can you let me know too.

 

Just for reference.

I had two different setups.
19x8.5 ET42 with 245/35, lowered and camber at -1.5
19x8.5 ET34 with 235/35 lowered and camber at -1.5

Both setups were rubbing on bumps and required some minor fender rolling.

Looks like the 245 and both 255 setups would be rubbing independent of wheel width. (If you run close to -1.5 camber)

 

Hope the photo of my wheels specs helps.

im running 19x8.5 in the front and 19x9.5s in the rear.

For tires, im running 245/35/19 in the front and 275/30/19 in the rear

No issues with rubbing UNLESS I hit a huge dip in the road with someone in the back seat --VERY rare.

I'm also on factory suspension.

 

There is still not much information about 255 front or 9.5” front though.

 

19x8.5 +40 with a 245-30/19 RE11 lowered on H&R springs would rub on hard dips.

 

I ran a 245/30ZR20 on a 9.5x20 ET +40 on my 2012 but I had to run a 3mm spacer to keep it from rubbing on the spring perch on my KWV3. Not sure if it would rub on the OEM struts. The 245 was a little stretched on the 9.5" wide wheel. I wanted to reduce the stretch and run a 255 so I changed out the barrels to make the front wheels 9.0" wide with an ET +34. The outer face of the wheel remained a constant distance from the hub mounting surface. The clearance adjustment was all on the inside edge of the wheel to clear the strut.
I am currently running a 255/30ZR20 Pirelli PZero Nero GT on those 9.0x20 ET +34 wheels without issue. As mentioned I am on KWV3 front struts with KMac top plate and camber and caster adjustable bushings. My front suspension settings and ride height are all highly adjustable. My current camber setting is about - 1.7 degrees. The face of my wheel sits about 3/16" inside the fender lip and the 255 is slightly stretched on the 20" wheel and slopes inward to the tread section.
A 255 section width tire is a perfect fit for a 9" wide wheel so why fool around with a 9.5" which only makes the fit more difficult.

 

Agree with Mort. Stick to 9” rims max in front if you don’t want to do fender work. Because a 245 will look terrible on them. You ideally want the max tire width possible, not wheel.

 

Ive ordered the wheels now, I just wondered if I could fit a 255/35

 

Those are the exact specs of my wheels (CCWs) and tire sizes (MPS4S), on a Canadian 2013 APX car which is about 1/2" lower than the US variants (P30 suspension + P31). No rubbing anywhere under full suspension compression.

 

This is the second time I've seen your posts suggesting this. Are you saying this just because the cars still use the p30 code or do you have other information to back it up?

 

I am not sure what you are referring to... suggesting what? That the APX cars have the P30 stiffer and lower suspension that was not available in the USA after 2011 as well as the P31 and an LSD? That is not a suggestion... that is what the APX package has. Or are you referring to something else?

 

Yes, that it precisely what I have been looking for, some reference by MB that Canadian APX package did include the "p30" suspension after the US discontinuation. I have seen a couple of posts that might reference the dealer material at the time, but I was hoping you might have that actual material saved as your posts keep coming up in my search.

 

See https://mbworld.org/forums/c63-amg-w...ml#post4858173 and https://mbworld.org/forums/c63-amg-w...ml#post4677322. And, see images below (last one in particular) from the brochure from mine:

 

Thank you, I appreciate your response. I have seen those posts, however I assumed the verbiage about the suspension was not a direct quote from MB so I still question it. I also wonder if the "AMG sport suspension" is just marketing and not the p30, the 2013 sedan equipment list shows the "AMG sport suspension" as Standard equipment on all C63 sedans... so more questions remain. I think that doing the measurements of ride height has given me the best answers as it does match p30 measurements, as well as datacards for US p31 sometimes list different springs and front shocks in the build (even when listed with p30), but will still look for some marketing material that hopefully is more specific.

 

In addition to the other goodies that are part of it, the APX package on the order sheet specifically references the P30 upgraded suspension, composite rotors and the dark grey engine cover. Furthermore, I have seen my car side by side to a non-APX Canadian coupe and mine does sit a little lower. I've also driven a non-APX 2013 C63 sedan which was noticeably more wallowy, although IMHO it was better suited as a daily driver on our crappy roads as the ride was considerably less jarring.

 

FWIW I have 19x9 +35 with a 3mm spacer in front. Tires are Falken 660s, 275/30/19. No rubbing but I have pretty aggressive camber, around -3.5. KW clubsport suspension, lowered a bit, probably 0.5"

 

Pics? I have 19x9.5 +27 on order that I will use a 265/30-19 on. I'm at -3.9° but I'm pretty sure it will need some fender mods.

 

this is interesting in that the Falken 660 275/30r19 is 0.7 inches narrower tread width (according to the tire rack measurement technique) than the michelin ps4s 275/30r19, 10.2 vs 10.9. BUT even though width of Falken 275/30r19 is same as a 255/35r19 michelin ps4s at 10.2 inches, the tire diameter of the Falken is the same as 275/30r19 michelin which is essentially the same as stock 235/35r19, 25.6 vs 25.5 respectively. So essentially with the 275 Falken you get 255 michelin tread width with stock tire diameter (25.6 falken vs 25.5 stock) whereas if you run a 255/35r19 or 255/30r19 michelin you change the stock tire diameter either up or down to 26 or 25.1 respectively.
So my question is with the limited Falken 660 19inch tire sizes, which rear size Falken 660 do you run to match up with those fronts?
also do those 275/30r19 Falken fronts only fit due to -3.5° camber? I also have kw clubsport lowered about .5 inch or so but I run -2.5° front camber even though I track the car a good bit because 3.5 is a bit too aggressive for street wear imho.
I doubt I would go to Falkens bc I need a tire that is good on a wet track most of the year being here in FL and I use r888r in the few winter months where track is more likely to be dry. But I do like the idea of a 10+ inch measured tread width up front with basically a stock tire diameter.

Currently I use 19x8.5 et40 front and 19x10 et50 rear wheels for track and stock 507 wheels for street

I attached tire rack spec sheets for 275/30r19 Falken vs 255/35r19 mich ps4s vs 235/35r19 michelin stock size, as tire rack width measurement technique is consistent across brands and is not merely brand claimed width.

 

I'll give the long version since I read so many threads and struggled a lot when thinking about new wheels/tires. Maybe this will help someone.

So I was coming from stock 18" wheels. After the KW clubsports were installed, I looked for wider wheels. I preferentially wanted as wide a front as possible, goal being performance (reducing understeer) and not stance. I settled on a 9" front, and couldn't easily find a matching set where the rear wheels were 10" and +50 or higher, without spending a lot more money or getting a custom set. I'm not experienced in buying wheels so maybe I missed something, but I did a lot of searching.

So the best set up that I could find was the HRE FF01 19" wheels. I did want 18" wheels but couldn't find anything that worked right and was wide enough. The fronts are 19x9 +35 (plus 3mm spacer), rears are 19x9.5 +45. The nice part of this is they'll easily fit the W212 E63 pretty close to OEM, so more potential buyers if I sell the wheels. Jasonoff, the main reason for my spacer is to clear the spring perch on the KW clubsports. I don't think I can push that front wheel out any wider without starting to rub the fender. The rears rubbed the fender a bit (I was lowered about an inch), so I raised the ride height in the rear as much as I could. There is no longer any detectable rubbing, as long as the rear isn't heavily loaded with passengers. I don't think the look or handling suffered at all, in my experience.

As far as tires - I was previously on 18" Falken 660s (235/40/18 front, 255/35/18 rear) for the stock wheels. Those tires were 25.4" tall and 25" tall respectively. I wanted to keep heights relatively the same because I was pretty worried about rubbing. Trying to get 275 width on the wheels, seemed like I needed a pretty low profile tire, with a strong sidewall for track/autocross. Falkens fit the bill again - so I am running 275/30/19 square, which are 25.6" tall. The fronts are ever so slightly pinched but still fit on the suggested range of rim width from Tirerack, and Falkens have a stiff sidewall. I have not tracked the new tire set up but on the autocross course there was loads of new grip, no tire rolling over in the front, and I've been really happy. In terms of wet weather, I've had no problems on the street (not driving like an idiot) in standing water. And I've tracked on a damp track with great results (on the previous Falkens). In the dry, I would think the 200TW Falkens offer a ton of grip for a given tread width compared to a 300+ TW tire. But I'm no expert. I just know they're a ton of fun, and not crazy expensive for the performance.

It's currently a daily driver and yes, I expect to be disappointed with tire life at the camber (and driving events) that I'm running. So I plan to put the OEM wheels and cheaper tires on most of the time for street driving, saving the tires for events. We'll see if there's much benefit to running a square set up, regarding rotating the tires.

Happy to take more pics if it will help anyone else.

 

Any pictures of your car with them wheels? Also do you know what the tread width is for 275/30/19 Conti sport contact 6? I can’t find this information anywhere and need to compare it to a ps4.

 

No, tire rack doesn't show the conti 6 in that size and any manufacturer tread width rating would likely not be measured the same way tire rack does.


Here is a pic of my track wheels, they aren't on car right now so no closeups.

 

Tire industry sizes, carcass width and diameter are pretty much identical for all tire sizes.
Its really only in tread width where tires differ.
Tire Rack is the only site I have found that does tread width and that is because they physically measure the tread width using their own standard.

 

I have some doubts about this statement, afterall he is fitting a federal 275 on the front with stock fenders and no rub. I have not seen anyone do that with any other brand tire so the overall physical width seems obviously smaller than other 275 tires, as well as the tire rack tread width that measured 0.7 inches narrower.

 

There's quite a bit of material that goes on over the carcass of a tire. Just look at the inflated width of a an XL vs non XL tire in the exact same size of the same manufacture.

 

ya, i am sure carcass width means something to someone somewhere but practically we need comparable external dimensions to judge what fits without having to buy and mount tire to find out.