lbowroom

Yes, people tend to get hung up on terminology without understanding the principals behind them. With a wheel, and therefore a wheel spacer as well , two things are important, parallelism and concentricity. The faces need to be parallel to one another to stop wobble and they need be aligned on the axis of rotation to avoid eccentricity. A hub-centric wheel centers the wheel on the hub by having a tight fitting bore that interfaces with the axle hub regardless of lugs. Lugs are tapered and theoretically if you install and tighten them correctly should also provide good centration, but with the built in slop the wheel can set itself a little off center as you tighten up.

In the real world, nothing is truly parallel nor concentric. a bore of a cast wheel is not perfectly in the center, the wheel nor the tires are perfectly round, the mounting surface isn't perfectly parallel to the front face. That's one of the reasons we balance. Measuring runout is a good way to describe how true spinning objects are. I don't know actual wheel specs for runout. I would guess a runout of .005" on a 19" or 20" wouldn't be a problem at 100mph which would probably equate to a .001" runout on a wheel spacer. That's precise, good quality, but not super difficult to achieve. As long as the spacers aren't made by monkeys and you install your wheels carefully, should be all good.

Mike5215

My advice based only on my own experience is that a thin 5mm or 3mm hub centric spacer to get brake clearance is no problem. Putting a 10mm or 15mm spacer up front to get a more aggressive stance on your OEM wheels might give you vibration issues and not be worth the trade off.

zdonner

My wheels will be here tomorrow, so we will see - HRE seems to agree that they will work, I'm not sure if there are others running these wheels yet as previously mentioned as speaking with HRE directly, I've not been given that impression.

With that said, I'm sort of playing the remote "guinea pig". I'm also going with a much more aggressive tire selection that most, so if it all works, then that's going to be pretty helpful.

lbowroom

Yeah, 255/285 is pretty ambitious. I like a wider tire look myself and I'm glad to read you report that a 285 will fit on the rear. I was going to try 245/275 which puts the rolling diameters closer than stock as well but is slightly larger than OEM.

Are your wheels/tires coming pre-mounted ready to bolt on, or do you have to take them somewhere for mounting? Looking forward to the verdict.

OSMS_Carlsson

When I put back on my stock 19's I had specific spacers made in 12mm for the front that are 66.56 in and out, and exactly 5x112, the most important piece was making sure the bore is 66.56 (Not 66.6). I am running 40mm length bolts, and had 15mm spacers made the exact same for the rear with 45mm length lug bolts. I was warned that the rear bolts could be a bit long and that I may need to machine off a thread or two, but there was no issues, I used the 45mm length bolts in the rear and I posted a video just yesterday on my Instagram of the car driving 80mph + down the freeway and there is no vibration whatsoever in my steering wheel.

Believe me after being in this business for 25 years I was not going to set up my car to cheapen the function just to improve the looks. 3mm spacers are typically non hub-centric but are small enough to allow the wheels to still grab the hub. below is a picture of a 5mm spacer that is apart of a hardware kit for a Carlsson wheels, this is a similar system used by Brabus, and also some of the BMW tuners as well. This spacing system is designed with a larger bore wheel that allows the spacer with a hub locking ring to snap into the wheel and the hub bore is then on the side that goes on the car with a 66.56.

Hope this information helps.

Jim

zdonner

The 285 I chose for the 19" wheel is exactly the same OD as the factory tire, they were all mounted and such but with replacing the front wheels they will have to be swapped. I'll have everything at the tire shop tomorrow to find out.

OSMS_Carlsson

285 on a 9.5 rim is going to sit pretty square, in fact might even pinch a little, 285 on a 10.0 will sit with the shoulder of the tire being almost square. This also depends on the brand and tread pattern, but I have heard of 10.5 wide wheels going on the W205 in 20" and using a 295 and getting the clearance, so I will still just only be concerned about that Control arm issue up front.

Look forward to seeing how everything turns out. I am sure many here will appreciate your efforts.

Jim

lbowroom

So I poked around my front end last night. With the 7.5" OEM front wheel with a 33 offset, I can't slide my pinky finger between the steering arm and the wheel. Not a super accurate measurement, but it's in the ballpark. Call it 10mm. Wheel spacing calculator puts an 8.5" with a 44 offset 24mm closer to the steering arm and only 2mm to the outside. I see zero possibility of that bolting up. Unless my info about the factory wheel offset is wrong, he will need another 15mm or so of spacer which will probably put the rim lip beyond the top of the fender. Damn, it's almost 5pm in Atlanta isn't it? Where's our report?

atl 2 chi

Hope the outcome was positive.

OSMS_Carlsson

I'm thinking it probably didn't work?

I know everyone here is anxious to know, but based on the applications that have already been attempted I think the outcome was probably an equal challenge like the rest.

Hopefully there will be a confirmation. Going forward I think Multi pc wheels are going to be the way to go...more expensive, but at that point they can be built to exact spec to guarantee the fit.

Jim

atl 2 chi

I was told also by another wheel make(Vossen) that having a wheel built for the car is pretty much the only option at the moment.

zdonner

Pretty much - busy weekend, I went in Friday, we tossed a wheel onto the car, it didn't fit even with the spacer and I went on with my day.


Currently exploring other options with HRE at this time.

lbowroom

So much for people all over the country installing them on 450's with absolutely no issues.

OSMS_Carlsson

I honestly think this car will need to be set up like one of the old AMG W210 applications where you fit a 8.0 front with a ET33-35, and a 9.0 rear with a ET35-38, these sizes in 19 should accept the factory recommended tires with no issues, and allow the tires to sit on the rims with a square position, and fit right to the outside of the fenders.

Just my 02

lbowroom

I haven't heard of any trouble fitting the rears. 9.5" and even 10" with +52 offset. Is there a concern?

lbowroom

It would be nice to have HRE reps or engineers chime in. It does look as though they incorrectly lumped their sizing recommendation for the C450 in with the C300 and C400.

OSMS_Carlsson

The only concern I would have is with the tires, since running an 8.0 inch wheel up front is going to be required for the suspension, you can avoid doing the guess work with the tires, and so you avoid the rear tires from stretching on a 9.5 or 10.0, which will throw off the OD for the 4 MATIC, I am suggesting to run the wheels in a 8.0 and 9.0 with the 225 and 255 combo.

Attached is a shot of my car with the 9.5 rear with the factory 255, you can see that the shoulder of the tires are rounded and stretched a little bit.

Jim

lbowroom

I didn't realize the factory 19 run a 255. I assumed it was a 245 like the 18"

OSMS_Carlsson

Sorry, I should have clarified the 19's from my application. My car being a 2wd 300 didn't really matter, but my car came with 19's and I ran the factory size to save a few bucks, and I did not want to promote the application with other tires since there are so many 4matic cars being sold based on the W205, so when I did my car I fit the 8.5x19 ET45 front with the 225/40-19 and the rear was a 9.5x19 with the 255/35-19. Again these tires pinch a little bit on the factory AMG wheels that are 7.5 and 8.5, and so in order to keep the OD for the 4matic going to a 8.5 and 9.5 with the same tire would not effect anything, but now since the 450 for sure is going to require an 8.0 max up front, I am suggesting a 9.0 rear to match with the 255. Again the offset will be more aggressive and the application and stance should look correct on the car. Again, just my 02.

I know a few of the Forged wheel manufactures that build 1pc forgings in these sizes, and also the multi pc guys as well. The only thing is the cost is going to be a greater expense over the cast manufactured wheels, but it is a get what you pay for deal! Right now there are a few 450 owners that have thrown good money after bad and spent time and money to still be without wheels that fit.

Jim

hbu

I been looking for aftermarket wheel/tire for the C450. Can someone point me the website or link? I already try tirerack and some other website. Our wheel size and off set is special...Please help

atl 2 chi

That's what this thread is about. We are all waiting just like you. Waiting sucks!!!

aimless

Anyone have info regarding the S205 Estate version of the C450?

Found this article about a company named VATH and they have modified an S205 with 19" wheels with 245 rubber up front. From the looks of the pictures the tires have a bit of stretch so I'm guessing 8.5. Wheels also have some decent concavity to it.

The article mentions aggressive body kit but it looks OEM to me except for the C63 rear diffuser and exhaust tips. Article also mentions upgraded braking but those callipers also look the same.

So does the S205 have a wider front fender than the sedan?

http://www.carscoops.com/2016/04/mer...ment-from.html

This whole thing blows. My reasoning for going with the 18s was so to throw a set of 19" on for summer and use the 18" for winter. If only I had knwon that 8.5s wouldn't fit.. who would have thought.. I'm probably just going to source a set of W204 multi spokes and run some spacers.

NYCSoiL

What offsets would you recommend? for 8" front and 9.5" rear?

Im coming from Genesis Coupe and picking up my first Benz ever on monday... Need to get wheels asap, OEM 18" are way to ugly

lbowroom

http://fitment.tsw.com/alloy-wheels-...odel=C450+W205

Looks promising. 19x8 fronts with 32 offset and 19x9.5 with 53 offset available from TSW.

surferboy92921

Looks promising indeed...but still pissed that the offsets from the rear compared to the front are so different. I want a 4 square tire set up....and it looks impossible to do. Coming from a BMW staggered set up, the squared set up was so much better.