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fitted the 295/30/19 Michelin Pilot 4s on standard rear 9.5" wheels. Fronts are standard Michelin Pilot Sport 245/35/19 tyres. Only 10,000 so fairly ok.
Pros: massive grip straight line. Car spins a little and then just goes. Almost feels like its lost power and needs another power upgrade. No rubbing anywhere. Looks great from behind.
Cons: the character of the car has changed. car doesn't feel anywhere near as playful around slower tight corners..... Doesn't pivot as easily... almost feels heavier.
Also noticeable initial understeer. Rear can still slide easily under power but there is less feedback and the slides are less progressive. The rear is more snappy. Car feels less stable on b roads.
I still have the option of putting the 265 from the rear to the front.... this may neutralise the handling?
Also noticeable initial understeer. Rear can still slide easily under power but there is less feedback and the slides are less progressive. The rear is more snappy. Car feels less stable on b roads.
I still have the option of putting the 265 from the rear to the front.... this may neutralise the handling?
Moving the 265s up will help with neutralizing the handling. The increased rear grip without changing the front is causing the understeer.
I just threw 285/35/19 on my stock rears yesterday and the ability to put power down over the Conti all seasons the previous owner had is much improved. Went with S007a, the RE-11 successor
you have different, construction, and compound tires on the front, which could be part of why it doesn't turn in as well, unless you have Pilot sort 4S's on the front as well really can't compare to 4 identical stock PSS's
further update with 295/30/19 on the back of sedan with standard wheels - car feels dangerously floaty in the rear under heavy braking at higher speeds.
Very strange feeling.... almost feels like the rear will step out under heavy breaking...while travelling in a straight line.
I am assuming its not the tyre width but rather the fact that it's not the correct sized rim.
@RDO247 did you experience anything similar when on standard wheels?
further update with 295/30/19 on the back of sedan with standard wheels - car feels dangerously floaty in the rear under heavy braking at higher speeds.
Very strange feeling.... almost feels like the rear will step out under heavy breaking...while travelling in a straight line.
I am assuming its not the tyre width but rather the fact that it's not the correct sized rim.
@RDO247 did you experience anything similar when on standard wheels?
No, I haven’t experience this floating feeling.
At the drags I hit 200 km p/h and brake heavily to turn off with no issues.
I do have a full K-Mac Camber Kit so I wonder if it’s an alignment issue.
I have also also heard that AMG rear sub frames are know to step the rear out under acceleration due to their bushings hence why K-Mac offer a sub frame bushing kit.
I wonder if your experiencing this but under deccelation???
So loving the 295 in the rear of the sedan. What a difference in straight line grip. 0-100km consistently under 4sec with 4 people in the car. (measured on a racelogic unit.)
In slow corners the car is still fun and very easy to slide and control. Where is gets annoying is in faster cornering. You can feel the rear 295 tyres flex on the 9.5" wheels. This causes the rear to feel unsettled. Gripp is still ok but the vehicle doesn't feel as well planted or as reassuring when pressing hard in corners.
So loving the 295 in the rear of the sedan. What a difference in straight line grip. 0-100km consistently under 4sec with 4 people in the car. (measured on a racelogic unit.)
In slow corners the car is still fun and very easy to slide and control. Where is gets annoying is in faster cornering. You can feel the rear 295 tyres flex on the 9.5" wheels. This causes the rear to feel unsettled. Gripp is still ok but the vehicle doesn't feel as well planted or as reassuring when pressing hard in corners.
I have ordered BC forged rims... 8 week wait!
May I ask what are the fitments? In recent months I've tried different combinations, all these experiments tell me that "recommended width" is indeed a useful reference to follow. For the front, MPSC2/MPS4S 255/35 on RC104 9Jx19; for the rear, MPSC2 285/35 on OEM 9.5Jx19, MPSC2 285/35, MPSC2/MPS4S/PTR 295/30 and MPSC2 305/30 on RC104 10Jx19, all without spacers. 305 would work on aftermarket wheel but it rubs fender frequently even after adjusting heights through KW V3, and it looks bulge outside so not an ideal size for the sedan. My conclusion is that 295/30 is the widest tire you can put on Sedan without any issue, obviously the best rim for 295/30 is 10.5J. However aftermarket wheel sellers don't always recommend or produce this size for C63 sedan, so 295/30 on 10J became a decent compromise. For riding differences comparing to 245/265, I'd agree most of what you mentioned, bigger tire on none-optimal-range rim definitely affect the handling.
Last edited by jerrytsao; Apr 18, 2019 at 04:48 AM.
I ordered wider wheels. BC Forged. I had no choice but to go custom sizes as no one makes the offset needed. Probably because they need to be fully forged for the added strength at the required offsets.
i had the car on the hoist at my local wheels importer doing final measurements.
We went for
rear 10.5” et 56 (295/30/19)
front 9.5” et30 (265/35/19)
A big thanks to @RDO247 for his research. I basically followed his measurements and they will work.
Originally Posted by jerrytsao
May I ask what are the fitments? In recent months I've tried different combinations, all these experiments tell me that "recommended width" is indeed a useful reference to follow. For the front, MPSC2/MPS4S 255/35 on RC104 9Jx19; for the rear, MPSC2 285/35 on OEM 9.5Jx19, MPSC2 285/35, MPSC2/MPS4S/PTR 295/30 and MPSC2 305/30 on RC104 10Jx19, all without spacers. 305 would work on aftermarket wheel but it rubs fender frequently even after adjusting heights through KW V3, and it looks bulge outside so not an ideal size for the sedan. My conclusion is that 295/30 is the widest tire you can put on Sedan without any issue, obviously the best rim for 295/30 is 10.5J. However aftermarket wheel sellers don't always recommend or produce this size for C63 sedan, so 295/30 on 10J became a decent compromise. For riding differences comparing to 245/265, I'd agree most of what you mentioned, bigger tire on none-optimal-range rim definitely affect the handling.
I ordered wider wheels. BC Forged. I had no choice but to go custom sizes as no one makes the offset needed. Probably because they need to be fully forged for the added strength at the required offsets.
i had the car on the hoist at my local wheels importer doing final measurements.
We went for
rear 10.5” et 56 (295/30/19)
front 9.5” et30 (265/35/19)
A big thanks to @RDO027 for his research. I basically followed his measurements and they will work.
Niiice, HRE won't let me do 10.5 so I had to give up on that, I'd prefer 9 and 10.5 without upsizing too much on the front, but since E63 has the same front & rear albeit on 20'', who knows maybe it's better off.
Last edited by jerrytsao; Apr 19, 2019 at 03:06 AM.
Niiice, HRE won't let me do 10.5 so I had to give up on that, I'd prefer 9 and 10.5 without upsizing too much on the front, but since E63 has the same front & rear albeit on 20'', who knows maybe it's better off.
What do you mean by they won't allow you to do that? HRE has what's called "F2 Fitment" where you can call out your own widths and offsets.
Did you change your the front size to support the the rear change?
the reason I ask, I changed the rear to that size you mentioned and now have a strange trailing sensation when changing direction suddenly or in tight corners. Thus I was wondering if I should up the front size?
I’ve just recently fitted new BC Forged monoblock 19” wheels.
I can can confirm the below specs will fit C63S Sedan that is lowered 20mm f&r and fitted with K-Mac f&r camber kits with 1.5 neg camber front and -1 neg camber rear.
Front: 265/35/19 PS4S / 19x9.5 et 30
Rear: 295/30/19 PS4S / 19x10.5 et 57
Hope this helps.
Hi RDO247 - Firstly, I think your car looks bonkers WOW!
Quick question on the splitter up front - I noticed that you only have the canards and the part just below which runs over the splitter lip in carbon fibre. Can you tell me where you got it from? I was looking for the exact same thing everywhere on the internet but struggling to find just that part as I don't want the lower part of the splitter in carbon fibre - you get the brabus one and I don't like that too much to be honest. I like it just like how you have it - be a massive help if you can share. I'm based in London UK btw…
Many thanks,
Butch AMG
Hi RDO247 - Firstly, I think your car looks bonkers WOW!
Quick question on the splitter up front - I noticed that you only have the canards and the part just below which runs over the splitter lip in carbon fibre. Can you tell me where you got it from? I was looking for the exact same thing everywhere on the internet but struggling to find just that part as I don't want the lower part of the splitter in carbon fibre - you get the brabus one and I don't like that too much to be honest. I like it just like how you have it - be a massive help if you can share. I'm based in London UK btw…
Many thanks,
Butch AMG
Hi RDO247 - Firstly, I think your car looks bonkers WOW!
Quick question on the splitter up front - I noticed that you only have the canards and the part just below which runs over the splitter lip in carbon fibre. Can you tell me where you got it from? I was looking for the exact same thing everywhere on the internet but struggling to find just that part as I don't want the lower part of the splitter in carbon fibre - you get the brabus one and I don't like that too much to be honest. I like it just like how you have it - be a massive help if you can share. I'm based in London UK btw…
Many thanks,
Butch AMG
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
Front Splitter - carbon
WOW!
