B Harv

I just wanted to throw this information out there since I found it fairly hard to gather information about the correct spacer thickness, correct bolt lengths (shank), and whether it would rub or not on my specific application.

Same as many of you, I wanted to add a bit of track width to the car and decided to go with 12mm front spacers and 10mm rear spacers on my 2013 P31 STOCK ride height car. I was swapping the stock 18's with a set of identical powder coated wheels wrapped in Michelin Pilot Sport 4S's so I figured it would be the perfect time.

I sourced my hardware from Phil at Otis Inc. LA and he lined me up with all the correct length bolts for the 10/12mm spacers. I would recommend them highly. Good quality hardware and the guy really knows his applications.

Below is my specs and a few pictures to give you an idea of fit and hardware quality.

Specs:
2013 C63 AMG - P31 - STOCK ride height

Wheels -
REAR - Stock 5 spoke 18x9 - 54 offset (powder coated - Highland Bronze with Casper Clear top coat)

FRONT - Stock 5 spoke 18x8 - 45 offset (powder coated - Highland Bronze with Casper Clear top coat)

Tires -
REAR - 265/35ZR-18 MICHELIN PILOT SPORT 4S XL

FRONT - 245/40ZR-18 MICHELIN PILOT SPORT 4S XL

Spacers -
REAR - 5/112 bolt circle, 66.56mm hub diameter, 10mm thick, hub-centric and wheel-centric - machined finish (p/n = WSMBZ5112665610)

FRONT - 5/112 bolt circle, 66.56mm hub-diameter, 12mm thick, hub-centric and wheel-centric - machined finish (p/n = WSMBZ5112665612)Bolts -
REAR (FOR THE 10MM SPACERS) - Lug Bolt 14mmx1.5, 38mm Shank, Ball Seat, Hex 17, Total Length 57mm, Black - (p/n = B-S17D38-ZNNITT)
FRONT (FOR THE 12MM SPACERS) - Lug Bolt 14mmx1.5, 40mm Shank, Ball Seat, Hex 17, Total Length 59mm, Black - p/n = B-S17D40-ZNNITT)Pictures:Before Wheels/Tires
Before Wheels/Tires (profile)

Before Wheels/Tires (3/4 view)

Before Wheels/Tires (Track Width)
After Wheels/Tires

After Wheels/Tires (crappy profile pic - w/o center caps)

After Wheels/Tires (3/4 view kind of)

After Wheels/Tires (track width)

After Wheels/Tires (rear track)
Wheel & Hardware Pics
After Coating


Before Mounting

Closeup of Hardware with Center Cap
Just stepped up the tire width one size front and rear with a slightly taller sidewall, which I prefer. The Michelin PS 4S's are far superior to the Continentals that came with the car in terms of grip and have slightly less road noise (could be due to the fact that I road the Conti's for 8-9k miles). Ride comfort stayed pretty much the same.I realize the wheels might not be everyone's thing but I took a chance on the color/texture and I think it turned nice. Definitely probably not going to see one around here like it so I'm pleased with that.Just wanted to share my results and throw out the consolidated info for anyone wanting to do the same. Overall, I would highly recommend it to anyone not wanting to step up a wheel size and improve grip dramatically.

Mort

Hey B looks great I like it.

Cwagon

Looks good and like the stance from the spacers.
Any rubbing issues?
I run E400 wheels on my estate, same offset and size except front wheels are 8.5" instead of C63 8".
I will upsize to 245 next time on front, currently run MPS 4S's in 253/40 x 18 & 275/35 x 18.

sqitis

Awesome setup! Where'd you get the spacers and bolts? I'm looking for the same spec's with my OE wheels.

Edit: Never mind, found it in your thread.....LOL Did you send off your original wheel to PC or get a different set?

Bonesxxx

Great post OP. Been looking at similar set up. In retrospect, could you have done 275s in the rear as others have suggested w/OEM 18" wheels?

AND were the spacers necessary for clearance or did you do it only to widen the stance?

Thanks,

B Harv

Man, I love me an estate! Too bad we didn't get the wagon version of the C63 here or I would most definitely have one. Its just awesome seeing something haul *** with the kids and groceries in the back!

I'm not familiar with the E400 wheels in particular but I wouldn't see why they wouldn't fit with a 245 on the front of your estate. There is definitely a bit of room to work with in the front even with the 245's on my setup. I don't know if I would step up another size on my ride but I wouldn't see a 1/2" wider wheel being a problem with the same size/brand tire.

B Harv

I would highly recommend this setup and the supplier (no, I'm not affiliated in any way). I wanted to avoid any issue with rubbing or having to track down issues with the setup so I played it safe. I think for the money its a homerun.

Of course, a set of forged wheels would have been ideal but I wanted to keep it as stock as possible. Just wanted something a bit different for the time being. To be honest, I love the look of the original wheels with the car since they match almost perfectly with the paint. Who knows, maybe I'll swap things around when I get tired of these.

No, I bought a used set of the same wheels to get powder coated so I could keep the original wheels with the car when, at some point, it moves on to the next owner. Also, it was nice not having the car on jack stands and being able to drive while I was getting things swapped out.

B Harv

I may be able to squeeze a set of 275s in the rear. I'll double check my clearance later today and get back with you on that one. I just don't really see the need for 275s when these 265s grip so well in comparison to the Conti's that were on it before. You really have to try and get these things to break the rear loose.

Of course, with the traction control off its easy to get a smoke show but during regular spirited driving with the same TC setting, its all good. I've pushed these tires fairly hard (as hard as you can safely on the road) in the 200 miles I've had them trying to produce understeer or oversteer and it has all been predictable. Still haven't been able to produce much understeer but the oversteer is obviously there if your being a hooligan. I would imagine in a track setting this would be a fun predictable setup. The only reason I'd see the need for 275s would be to get the holeshot at the drag strip.

I'm uncertain if the spacers are necessary for clearance for the step up one size in width but I would imagine you would be ok without. I did it purely to get the tires more flush with the fender wells and it didn't disappoint. The stock offset is drastically conservative.

edit: Keep in mind I have an LSD in the car. The stated car behavior above will be much different in a non-LSD car.

S-Prihadi

My 2014 E400 sedan OEM AMG wheel is made by Ronal, it is 18" , with Bridgestone RE050 245/40 front and 265/35 rear.
I replaced it with Michelin Pilot Sport 4, regular 4 not 4S. For some reason unknown, 4S in my country only available at 19" and up and I will never go for 19" for my crappy road.

But front wheel/rim is 8.5 J ( not 8J ) at 48 offset ( not 45 ) and rear 9J at 54 offset.

I am wondering, at 12mm spacer front , won't that effect scrub radius and eventually handling ?
Won't the wheel bearing load will change for worse at 12mm offset ?

Your powder coating , do you know at what temperature the baking process was done at ?

Thanks

B Harv

Yes the 12mm front spacer will effect the scrub radius but I have not physically noticed any negative effects so far. There is no increased effort to the steering wheel at slow speed, nor does the wheel have any issues going back to center. Tire wear is a long term symptom so I can't comment on that since I've only had the setup on for a few hundred miles, if that.

As for the handing, I don't know the exact physics of adding a small offset to the OEM wheels but I can't imagine it would be much different (if any at all) than adding an aftermarket wheel with that offset built in. I didn't expect any drastic handling differences with the setup in respect to the spacer itself and haven't experienced anything different in the spirited driving I have done with the setup.

I believe the main handing difference in my case is with the tires and the tires only. I very highly doubt the spacers are doing anything significantly positive or negative to the handing at all.

As for the wheel bearing load change, yes there will absolutely be a negative change to the bearing unit in the very very long term in relating to the stock offset. Will that small change in offset ever effect that unit to the point of a premature failure, I highly doubt it. In my experiences with other types of vehicles is that added weight (heavier wheels/tires in addition to added offset) is a larger factor than anything else that leads to bearing failure. There are hundreds of people running spacers on this forum alone with very few issues from what I can tell. Just be sure to get hub-centric spacers.

The powder coating process was baked in the oven at around 400 deg F.

Cwagon

Mines a Performance pack and came std with 19"s but I wanted a slightly softer ride to carry our mothers around so went looking for the later 18" C63 wheels when I came across the E400 wheels which are almost the same as the facelift 18" wheels 2011-2014.
As stated the fronts are 8.5" wide and I will be fitting 245/40 next time.
The current Michelin PS4's were actually from my last car so just fitted them to my new wheels.
I had thought of 10 or 12mm spacers but am pretty happy with the std setup.
A mate of mine who has a E400 estate (where I first saw my wheels) runs 245 fronts and 265 rears.
We have compared our wheel tyre combos and the 245 is much bigger than the 235 both in carcass and tread width but the 265 and 275 have almost identical tread and carcass widths only the height (diameter) being the major difference.

Cwagon

Have you considered replacing the bolts with studs, https://www.eeuroparts.com/Parts/808...eat-104K10068/
I dont know if I would feel safe with floating spacers and bolts as there is next to no hub for the wheel to center and take weight on.
At least studs give the wheel something to center on.

Cwagon

I have compared the 265 and 275 tires on same rims and apart from the height difference the tread and carcass widths are almost identical .

Cwagon

S-Prihadi
We're the same in OZ, we can only get the 4S in 19" or bigger
your right on the offset but what I was alluding to and I'd forgotten when I posted was that with the wheel being 8.5 @ 48P the outside edge of the wheel is in the same position as would a 8" @ 45P.

S-Prihadi

Dang, I thought only my country can't get nice 4S in smaller 18" size

Mort

For what it's worth the wheel nuts in that kit have the incorrect ball seat radius R12. Our OEM wheels have a R14 ball seat radius as far as I know.