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Hey catmandoob... Here's the info I received from Forgestar a few years ago when I purchased my rims. My C63 has been lowered .5" all round.
Forgestar... ".... As shown the fitment is 19x8.5 19x10 235/35/19 265/30/19 we do not disclose the offsets but as you can see the fitment sits flush to the fenders once lowered...."
I can confirm I have no-rubbing even with 2 passengers in the back seat...
Not sure if this helps you, but hope it helps.
Mauro
I think the ET's is my question, with a 55 offset and 10" wide barrel does the strut have clearance? I went to measure but damn, seems awfully close.
In the end do I trust these settings. I guess roll with it and see what I get, I just noticed I don't hardly see many actually using that 57 offset or 55 on a 10" width. Roswell always posted stay as close to 50 as you can in rear. Is that just for 19's?
Just trying to grasp how rim diameter impacts width of barrel used which changes offset. Or am I over analyzing it.
Last edited by catmandoob; Sep 8, 2020 at 06:36 PM.
Whats up all, got a quick question and just when I thought I had it all figured out I got a curve ball.
Going with BC Forged wheels, they replied to me with this:BC Forged replied with this:
On a W204 chassis C63 the specs provided would sit flush on a lowered car but would require stretched tires and/or the rear fenders to be rolled. If the car is stock ride height with non stretched tires I would suggest scaling the setup back to around a 8.5 +40 and 10 +57 to +55 rear
The specs I asked was 18x9 ET 40 and 18x10 ET 50. Was I way wrong on my calculations, how can 19" wheels sit flush and fine like that but 18's can't?
I'm thinking of ordering a set of Australian Koya Semi Forged wheels (flow formed) and wondering whether to go same as you asked for 18x9 +40 & 18x10 +50 with 245/40x18 & 265/35x8 Michelin PS4 for that really flush look.
Or go 18x8.5 +40 & 18x9.5 +45 with same tyres only worried about fender clearance on rear.
Koya's rears in 18's ET only go up to +45 for 9.5" but +50 for both 9" & 10"
Currently running 245/40 & 275/35 on E400 wheels 8.5"F/9"R.
Yes the 275 look a little baggy but definitely help get power down and protect the rim.
I'm thinking of ordering a set of Australian Koya Semi Forged wheels (flow formed) and wondering whether to go same as you asked for 18x9 +40 & 18x10 +50 with 245/40x18 & 265/35x8 Michelin PS4 for that really flush look.
Or go 18x8.5 +40 & 18x9.5 +45 with same tyres only worried about fender clearance on rear.
Koya's rears in 18's ET only go up to +45 for 9.5" but +50 for both 9" & 10"
Currently running 245/40 & 275/35 on E400 wheels 8.5"F/9"R.
Yes the 275 look a little baggy but definitely help get power down and protect the rim.
Honestly that's what gets confusing, from personal experiences around here it seems what you and I asked for should work even with 18's. I've had multiple reputable places adjust those numbers, by my reading up many including Roswell give a window so as long as you fall in it I guess we should be ok. I think Roswell said for rear stay between 48 to 55 offset for 9.5" to 10" barrel which sounded like good to 265/275 xx tires.
Plethora of knowledge here and ways to do it, just scattered on finding that fit your looking for something in particular. But everyone is right it's here buried somewhere, just discouraging when you think you have it dialed in only to be guessed by their wheel engineers lol. Which lord knows they know more than I do hahaha
Not technically aftermarket but just fitted a set of 2nd hand W205 C63s forged cross spoked wheels in titanium finish.
Fronts 8.5" x 19" ET38 (with 3mm spacer ET35) 245/35 Michelin Pilot Super Sports.
Rears 9.5" x 19" ET56 (with 4mm spacer ET52) 265/35 (yes 35 series std on W205 C63s) Michelin PSS.
Speedo reading approximately 3% slow according to Will They Fit Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit, Wheel Size: 19", Wheel Width: 9.5"
I had to fit thin spacers as I'm running a stud conversion and my nuts would not seat properly with out spacer as the studs are a smidgen too long for std wheels.
Easier to fit spacers and get a more flush fit look rather than buy and fit open nuts and fit chrome caps.
The original owner had these in storage and has lost one of the screw on caps so I'm waiting to see if he finds it so for now one side has them and the other side has std clip in plastic Merc caps.
These screw on caps also run a dish that covers the bolts but the dome nuts stick out a little too far which is where the open nuts might help but I kind of like the look with out the dish.
Not technically aftermarket but just fitted a set of 2nd hand W205 C63s forged cross spoked wheels in titanium finish.
Fronts 8.5" x 19" ET38 (with 3mm spacer ET35) 245/35 Michelin Pilot Super Sports.
Rears 9.5" x 19" ET56 (with 4mm spacer ET52) 265/35 (yes 35 series std on W205 C63s) Michelin PSS.
Looks great!! I just picked up a set of the satin black ones for my white sedan, can't wait for spring to mount them.
On the weight front these factory forged rims aren't that lite but are still lighter than factory cast wheels.
My E400 18" wheel/tires weigh 23 & 24kg for 8.5" 235/40x18 & 9".275/35x18
The forged C63s 19" rim/tires weigh 21.5 & 22+ kg for 8.5 245/35x19 & 9.5" 265/35x19.
E400 8.5" x 18"
E400 9" x 18"
C63s 8.5" x 19"
C63s 9.5" x 19"
Bathurst gun on my c63
9.5x19" ET45 265/30 continental sportcontact 6
Small massage of fenders.
No pic of front yet.
Edit, i noticed it might be interesting with weights, i can´t remember exact weight, but i remember the difference, the new wheels are almost 46lbs lighter, even thou i´m comparing to worn out rear tires.
Last edited by swedepat; Dec 13, 2020 at 01:43 AM.
Took a small trip today, car needs a bath now.
Front wheels are 8.5x19" ET 39 with 3mm spacer to clear calipers.
Tires are 235/35-19" at front, also sportcontact 6
Sup gentlemen, wondering if you guys can help me out. I'm looking at a set of BC Forged wheels for my 14' C63 507 edition lowered on H&R springs with the thicker 17mm rear pads. I picked out a set that looks to have concave and would like as much concave as possible to have that aggressive look. The wheels full forged monoblocks that are customizable other then the offset I believe as they don't show the offsets on the website.
The tire size I'd like to run are fronts 245/35/19 and the rears 265/30/19 but I'd like to run toyo proxies r888r which I've heard they run wider than ps4s which is what I'm currently on.
My question is what size rim should I be looking at? 19x8.5 fronts and 19x9.5 rears? or up .5 each rims would give me a better concave look?
Also I'd like to know what offsets should I be running??
There is always the option of me dropping down to an 18" rim.
The wheels I'm looking into picking up are the BC Forged RZ22 or RZ21.
My goal is to be able to fit those tire specs on the wheel and also have a good concave while being as much flush as possible. Please help me! lol
Sup gentlemen, wondering if you guys can help me out. I'm looking at a set of BC Forged wheels for my 14' C63 507 edition lowered on H&R springs with the thicker 17mm rear pads. I picked out a set that looks to have concave and would like as much concave as possible to have that aggressive look. The wheels full forged monoblocks that are customizable other then the offset I believe as they don't show the offsets on the website.
The tire size I'd like to run are fronts 245/35/19 and the rears 265/30/19 but I'd like to run toyo proxies r888r which I've heard they run wider than ps4s which is what I'm currently on.
My question is what size rim should I be looking at? 19x8.5 fronts and 19x9.5 rears? or up .5 each rims would give me a better concave look?
Also I'd like to know what offsets should I be running??
There is always the option of me dropping down to an 18" rim.
The wheels I'm looking into picking up are the BC Forged RZ22 or RZ21.
My goal is to be able to fit those tire specs on the wheel and also have a good concave while being as much flush as possible. Please help me! lol
Any help is much appreciated!
I would say 30-40 offset for the front, and 45-50 in the rear, depending on your height, camber settings etc.
Fronts @ ET39 is fine but rears need to be no less than ET45 .
Std C63 rear is ET52 so with those specs the rears would stick out a further13mm over stock ET.
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Stock rears are 18 x 9 ET+54. So based on 19 x 9.5 ET+39 the wheels will poke 15mm based on the ET and 6.35mm ( half of the increase in width) based on the wider wheel for an total poke of 21.35mm over stock wheels. Even at ET+45 the fit will be very close and 255 will be the widest section you may be able to run. Try running a 15mm spacer on the rear of your car ( for the +45 offset) and see how the fit is as the poke for a 19x9.5 ET+45 is 15.4mm. There is no way the 19x9.5 ET+39 will fit without some serious fender mods.
Here is a good wheel comparison tool you can use: https://www.willtheyfit.com/index.ph...9-5&offset2=45
This is amazing! Love the meaty tire look! How were you able to get Welds to fit? You end up ordering 5x4.5 and then taking them to a shop to machine them to make them fit? How much of a pain in the *** is it to make them fit? What offsets would you need to have to run a setup like this? Pretty sweet you did this setup! Would love to see more C63 like this!
Originally Posted by pNutz
Got me a new set of wheels for the track. It was a pain to make it work but in the end, it was all worth it.
17" Weld Racing Rt-S S77 wheels wrapped in 255/40 Toyo R888
For a set of wheels that are 19x8.5 front et 45 and 19x9.5 rear et 45, if I have Michelin PS4S 235/35/19 front and 265/30/19 rear tires on stock suspension, will I rub in the rear?
The wheel is going to poke 15.4 mm so it will be close and you might get a rub on high speed dips or when you have passengers in the rear seats.
Thank you for your feedback here. I wanted to have a 265 to have a little more grip in the rear but it sounds like 255/30 is the safe route here for no rubbing with a Michelin PS4S.
This thread has been great im currently waiting on my wheels and tires to show up. Went with 245/35 & 275/30 Pilots with 19/9 &19/9.5 ets 38F & 45R. Im curious to who has front and rear camber arms on their cars and what camber settings are you guys all running? I would assume most of these posts are on stock camber settings but thats why im asking
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