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C63 OEM vs Forgestar F14 Strength?

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Old 09-14-2022, 07:28 AM
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2005 CL55 (sold) C63 Coupe 2012 p31(sold) Audi 330awhp E55 511WHP(sold)Z06C6 550whp C63 LTH
C63 OEM vs Forgestar F14 Strength?

I’m curious to hear your experiences with F14’s in 18”, on my E55 I had flow forged rims and they cracked but that was also a heavier car and I was on 200 thread tires that were very rough and I kept running them at 30-32lbs not knowing the side effects.

I’ve been hearing mixed reviews on the validity of the statement of them being actually stronger then the 5 spoke oem wheels. Can it be said the cast vs flow formed convo is not really a true statement? Is it more so that the 5 spoke amg wheels heavy weight actually helps the longevity of the structure.

I do very well understand the pros to running F14’s but here in the north east I’m awfully concerned about structural integrity, we don’t get away with much due to potholes being extremely aggressive.

I’m very interested due to it being easily over 100lbs reduction when converting the unsprung weight over OEM Wheels . Lower E.T’s so flusher fitment but most importantly it would introduce a different tire patch to the ground(farther away) which I think we all overlook, the oem wheels would benefit the suspension geometry if it poked out more but the factory has its reasonings probably due to tire blow outs taking out the body.
Old 09-14-2022, 09:35 AM
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The OE wheels seem to bend pretty easily, so they aren't the world's strongest.
I haven't owned Forgestars, but I've had other "rotary-forged" wheels and they were tough as nails. Hopefully Forgestar is equally tough.

The tread wear rating (200) shouldnt have anything to do with the impact that the wheel is taking. It's more about the aspect ratio (sidewall height, basically). If you have a little bologna skin tire on there with a 1.5" tall sidewall, the wheel will take an almost direct impact from the street (or sometimes direct metal-on-asphalt contact) when you hit a pothole. The sidewall squishes a LOT on impact so you need to have some meat there to protect the wheel.
Also, if the tires are stretched enough that the lip of the wheel sticks out past the rubber, the lip will most likely hit the street in an impact, and it's most likely going to take some damage.
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Old 09-14-2022, 10:48 AM
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Flow formed wheels are marginally stronger in the barrel but the centre is still cast which is why flow formed wheels tend to break at the hubs before the barrel collapses. They are generally built to be lighter and sacrifice the additional strength for lightness so depending on the wheel they could be similar. And because they arent actually forged they will crack instead of bend
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Old 09-14-2022, 06:56 PM
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A quick search of this forum let alone the internet will show you that the F-14 has a reputation for failure. I went C-10 because I did not want to join the statistics.
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Old 09-15-2022, 10:39 PM
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This is an S2000, a much lighter car. You decide.

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Old 09-16-2022, 09:23 AM
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Originally Posted by chrisridebike8
This is an S2000, a much lighter car. You decide.

https://youtu.be/vtYjujhW27Q
I wish Apex made something that properly fit these cars. I smashed the **** out of two of them on a curb on my old M3, and the worse of the two still halfway held air.

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Old 09-16-2022, 10:04 AM
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Originally Posted by AMGSIXTHREE
I wish Apex made something that properly fit these cars. I smashed the **** out of two of them on a curb on my old M3, and the worse of the two still halfway held air.
Agree, running Apex ARC-8 on my e46 m3 and they are fantastic for the price point. 19x10 and 19x9 at 20 lbs a piece, ridiculous. I've had them for years with zero issue.
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Old 09-16-2022, 12:13 PM
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Originally Posted by lo-fi
Agree, running Apex ARC-8 on my e46 m3 and they are fantastic for the price point. 19x10 and 19x9 at 20 lbs a piece, ridiculous. I've had them for years with zero issue.
Not much love from them for MB, unfortunately. They make one, maybe two wheels for A90 Supra, but the offsets are way too low for W204.
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Old 09-16-2022, 12:56 PM
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Originally Posted by chrisridebike8
This is an S2000, a much lighter car. You decide.

https://youtu.be/vtYjujhW27Q
That looks eerily similar to the failure I had in my Z06 at SMMP a few years back. That was an OEM wheel though, and not aftermarket.
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Old 09-20-2022, 03:03 PM
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Seems like keeping the oem wheels is the way to go. Apex really needs to make something for MB idk why they avoiding it
Old 09-20-2022, 03:56 PM
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hard to compete with oem wheels for anything shy of $4k a set. Keep in mind a stiff metal is more brittle it is and it's tendency to snap/crack. The benefit of softer wheels is bending a wheel vs damaging suspension components.
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Old 09-20-2022, 04:16 PM
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Originally Posted by roadtalontsi
hard to compete with oem wheels for anything shy of $4k a set. Keep in mind a stiff metal is more brittle it is and it's tendency to snap/crack. The benefit of softer wheels is bending a wheel vs damaging suspension components.
I will say with a $4k investment it's well worth it imo. I learned after 2 sets of flow formed to just get forged and be done. Aluminum does fatigue so no matter what it's a when will it break not a if.
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Old 09-22-2022, 03:50 AM
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'12 C63BS "SlickTop", '08 CLK63BS, '16 E63S wagon, '12 CLS63, amongst other non-Merc toys
for the price, just go with Titan7, true forge at the cost of some cast wheels.
Old 09-22-2022, 10:33 AM
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Originally Posted by 1JDM911
for the price, just go with Titan7, true forge at the cost of some cast wheels.
Find me a c63 running them lol
Old 09-23-2022, 09:09 AM
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Stay away form Forgestars if you intend to do any performance driving. They are fine for street use as an aesthetic "upgrade" but not much else.
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Old 09-23-2022, 06:09 PM
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Originally Posted by alenpepic
Find me a c63 running them lol
as in, you must see it on another c63 so you can be a sheep to follow? or as in, you just wanted to see the availability of 5x112?

https://autotalent.com/products/tita...s-benz-c-class

listed for w205, but seeing on folks retro-fit w205c63s oem wheels onto w204c63, i don't see how these wouldn't fit on w204c63..

oem size/offset:

19x8 = +45mm Front

19x9 = +54mm Rear

link shows 19x8.5 +44mm, and I'm sure there are other sizing available with 5x112 bolt pattern, just reach out to any of the stockist/reseller of Titan7

here's another link, same width/offset/bolt-pattern but in 18's:

https://www.evasivemotorsports.com/s...atin-titanium/

Last edited by 1JDM911; 09-23-2022 at 06:11 PM.
Old 09-29-2022, 06:10 PM
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I’d like to interject … I ran 20x11 square CF5s on my ML63 which is a 5300lb tank of an SUV and I tracked the living **** out of that car (so much so eventually the motor gave out). The wheels were absolutely indestructible, granted it has 5 massively strong spokes but it was a bulletproof wheel. Thin spokes are the issue not whether OEM or not.

ask forgestar and they will tell you which wheel is best for your application based on load rating. If you use a thin spoke wheel on a heavy car that exceeds its load rating for track purposes then inevitably you can exceed what it was designed for.

correct, Forgestar has flow formed BARRELS nor centers so you do need to keep that in mind. Had them on many of my AMGs and two of my Aston’s (CF10s) and they were all fantastic and no issues. Forgestar did say CF10s are much stronger than F14s and they are lighter so I went with them at end of the day
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