chief63

Did they mention it would not fit at all or did they say it would rub? Rubbing can be fixed with a suspension but simply not fitting (way too wide) can't without fender work.

thanks

benyl

Here is the reply I got from Peter:



I asked him how flush the 19x10 +50 is with the fender and he replied with:


Not really an answer to my question. I will let you guys experiment with 275... haha

chief63

Thanks. The "Designo" C63 had 265 in the back according to Forgestar (not 275, so not sure what is the truth). Here the link with info and pics http://www.forgestar.com/blog/?p=775

From the pictures, there is definitely a 5mm buffer on the outside, but maybe not on the inside.

The place where I am getting everything installed is also a high end body shop (the guy used to run the Mercedes Benz body work at a dealer here too), I'll take my chances with 275 even if it requires what I feel to be minor work. I think the extra traction will be worth it.

I'll be posting more info soon in an official thread.

thanks

benyl

https://mbworld.org/forums/c63-amg-w...ml#post3872996

https://mbworld.org/forums/attachmen...wheel-c63c.jpg

chief63

Yes he is the guy forgestar was talking about needing some fender work to fit 275.

Thinking about it I have now opted for 235/19/35 and 265/19/30 as suggested by forgestar. I will return my current Potenza RE11 tires in exchange (still at the shop). Hopefully they have the new size for the same model.

superlubricity

FYI, in case you guys are looking for new TPMS sensors.

I just got my set from Tire Rack.

AirAware P/N 28214 for $56.00 each

benyl

Canadian cars don't use TPMS sensors. They use the abs sensors. Thanks though.

superlubricity

Ahh, didn't know that. That makes it a lot easier (and cheaper) for you guys.

qship5

I will also be going 275s in the rear with the 19x10 Forgestars. The wheels are due to arrive Friday and the tires are already here. I'll post up my results as far as clearance and any potential need to fender rolling.

Vegas_AMG_C63

I've just mounted GunMetal ForgeStar 19x8.5" and 19x10" w/ 245/35-19 and 275/30-19 Vredesteins.

The seat mounts on the factory bolts are ball type. ForgeStar used what looks to be a 60 degree taper. These are not compatible and can't be safely run together as only a small amount of the bolt will actually contact the seat in this situation. So just a note to any owners that are going to buy the wheels to budget and plan ahead for correct length bolts 14x1.5x25 having 60 degree taper seats. Not to mention that the factory bolts look hideous with these wheels, something polished will look much better.

I did have the opportunity to drive it around a bit with some bolts from another car that fit the bill. No rubbing so far and I don't think there will be any problems with the Vredesteins in this size. I'm actually wondering if a 295 would fit. Somebody's going to have to try. Keep in mind though that Vredestein runs small so this likely would not work with other tire brands.

As far as how they felt. Decent grip, not on par with the highest performance tires but not bad. I will say that the car seemed to be a bit squirmy. May have to play with tire pressures or they may just not have the sidewall strength of other performance tires in the UHP category. With that being said, I spend a fair bit of time at the track and push pretty hard.

superlubricity

Good info. Thank you for verifying.

Just to be clear, they are cone seat vs. radius seat, correct?

chief63

That's some very nice info thanks, are you running the stock suspension? I think the tire width issue is only with an aftermarket suspension.

I'll make sure to order new bolts ASAP, thanks for the great tip and post some pics!

all8up

Thanks for posting the info for us. Can you guys post up where you buy the lug bolts from?
Thanks

sjhugh

That photo of the C63 with the Forgestar rims has had a considerable amount of work carried out on the rear fenders.

A +50 offset on a 10inch rim is too aggressive for the car. Why have 10inch rims and then have to fit skinny tyres?

I have 20x10 inch rims on the rear which came with a +51 offset and the edge of the lip was inline with the outer edge of the fender when trial fitted, with 285/25 tyres (Yokohama Advan Sport) it scrubbed so badly it wasn’t practical to drive it. Plus lowering the car was an impossibility.

I had the fenders pulled out by 5mm and 5mm shaved off the base plate of the rims to make them fit without scrubbing. I didn’t have the fender lips rolled so as the keep the integrity (strength) of the fenders and to retain the stock look. It worked a treat.

Something you should note is that there is a 10mm clearance between the inside of the rim and the inner fender with a +51 offset. The inner fender isn’t metal, it’s a type of soft felt and even though I didn’t need to after doing the mods, it is easily cut away with a knife if necessary. If I was to re-order new 10inch rims, to replace the ones I now have, I’d be looking at a +55/56 offset. It allows a larger tyre with better outer fender clearance and still allows enough room to clear on the inside.

.

sjhugh

I would guess you’d get them from Forgestar, any worthwhile rim manufacturer would supply the correct lug bolts for their rims.

.

chief63

About lug bolts, would a 23-24mm shank be ok? I figure a shorter bolt will fit while a longer bolt will not?

What are the stock bolt specs? Is the 25mm shank mentionned accurate?

thanks

chief63

Why do I see when shopping that our C63 lug bolts are 12mm x 1.50" while you mention 14mm for the forgestar wheels (how can the diamater change)? I am picking up my car in 3 weeks so I don't have the owners manual to look it up.

PS. I've emailed forgestar about it.

thanks!

Vegas_AMG_C63

Based on your picture, Yes those are the 2 seat types I'm referring to. However it's worth noting that they are more commonly referred to as a ball seat and either taper or cone. Although it is a radius seat, when your looking through supplier catalogs, they usually refer to them ball seat or 60 degree tapered.

Yes, I am running stock suspension. The HR springs lower the rear a bit too much and it doesn't have the correct rake front to rear with these installed. I may change out to coilovers but that will be a bit later, lots of other goodies coming in the mean time.

The correct spec is 14mm x 1.5 Thread Pitch @ 26mm Length. That will leave about 1 thread out the back side.

Regarding wheel offsets. I'll need to confirm ours however it seems to me that they could have brought the wheel in a little closer towards the suspension allowing for a bit larger tire size. I can still light these up fairly easily on acceleration. My goal is to get the car hooked up a bit better and running an affordable tire. Kleeman mods come next and it's only going to get worse!

FWIW, I'm still really considering the 18" Forgestar to leave me with a lighter tire / wheel package and still run the widest tire I can. What I will say is that the 19" wheels look fantastic. I have Gunmetal on a Black C63. Once the rain stops and I get the bolts lathed down to fit, I'll post a pic since I know a few guys wanted to see them.

chief63

Thanks for the very useful info. What I'll do is when I put the new suspension I'll take some measurements to see if I could ever go with bigger tires in the back (apparently not). I have KW V3 coil overs ready!

To confirm what you're saying, Peter from Forgestar wrote back:

"14x1.5 26-28mm shank length is what we recommend to our Mercedez customers"

superlubricity

Thanks, Vegas.

I'm ordered the Gorilla Automotive 17018SD-20 - Small Diameter Lug Bolt Kit if anyone is interested.

Thread Size 14mm x 1.50 RH
Lug Bolt Seat Style Conical seat
Lug Bolt Head Style Tuner standard
Lug Bolt Material SteelLug Bolt Finish Chrome
Quantity Sold as a set of 20.
Lug Bolt Thread Length (in) 1.000 in.
Wrench Size Required (in) 3/4 and 13/16 in.

chief63

That looks great thanks superlubricity.

all8up

Thanks for the help guys. Were you able to find them in black instead of chrome? I haven't been able to locate them.

chief63

Since I'm not sure the black texture would be the same as the wheel, I would stick to chrome or silver. On the other hand if you still want black, you might be able to find black lug nut covers. The problem with black lug nuts would be that with time and wear, the silver would come out (scratches, dents, etc) and the top would look like crap pretty fast...

If you find a non chrome option please post it! thanks

James@ACG

WE have lug nut kits available if anyone is interested.

M14x1.5 Conical seat Spline drive with Key.

Price is $45.

Even Money

So should I get these w/ my F14 order? What kind of deals do you have on TPMS to make the swapping back and forth easier?