I've looked all over the internet and can't seem to find this info anywhere.
Does anyone know what the weight on the OEM 2019 ZR1 wheels is?
I ordered a set to replace my GS wheels and they weigh A LOT more than my current wheels.
I'm not looking to race my car or anything, but I also know that adding unsprung weight is one of the worst things you can do for handling and acceleration.
They feel like they weigh well over 10lbs more than the GS wheels.

 

Following. I'm also considering ZR1 wheels.

 

Okay, I just weighed them. The ZR1s that I have are 8lbs heavier for rears.
Now, beyond that little disappointment, I'm going to guess that at best these are re-manufactured, and at worst are very good reproductions.
I found a closeup of the logo on a website, compare that to the logo on the wheels I received...


Stock photo.

What I got.

 

The C7 ZR1 OEM wheels are forged, did you order these wheels directly from GM?

 

I ordered them from a vendor on here that advertised them as genuine OEM GM flow forged wheels.
I’ll post pics of the inside markings when I get to work this morning.

 

Pics...

 

These are the pix from mine. On yours something went wrong in the manufacturing process. Maybe didn't meet GM's quality requirement and was dumped to a reseller. Or it could be a knock-off. I've seen fake Rolex watches that match a real one perfectly on the outside...

 

Mine has the same info as yours, the letters just don't look as crisp.
I'd say someone went crazy with the coating and put it on too thick, maybe to cover some imperfections?

Does yours also say "RONAL 3909 Mexico" on the inside?

I'm guessing these are either 2nds or used, but that was not disclosed to me when I purchased so I really hope the vendor sends a pre-paid call tag and gives me a full refund on them.

 

I don't have a picture of the whole inside and don't remember the other markings.

 

I weighed my Stock ZR1 wheels and compared them to the new Forgelines and here is what they weighed;
Stock ZR1 Fronts = 28lbs
Forgeline Fronts = 24lbs
Stock ZR1 Rears = 33lbs
Forgeline Rears = 25lbs
(Forgelines Left in photo, Stock Right in photo)

 

Thanks for the weights, I think that's within a lb or 2 of what mine are. I know different coatings weigh different amounts.

Talked to vendor. They said I can return them but return shipping is on me. They swear I'm 100% wrong and these are factory 1st quality wheels. I sent him the pic of the logo from above.
I don't feel like I should be out of pocket for something that is obviously not what the rest of the wheels out there look like...

https://www.corvetteforum.com/forums...w-img_4126.jpg

https://cimg8.ibsrv.net/gimg/www.cor...b7a4aaf39.jpeg

https://www.corvetteforum.com/forums...l#&gid=1&pid=3

 

The chrome ZR1 wheels in your 1st link are defiantly "Stock" OEM ZR1 wheels (NOT AFTERMARKET KNOCKOFFS) and I can confirm this by the dull satin coating on the inside barrels.
The dull satin finish is a "Coating Over the Chrome, see the attached pics below. (1st pic is how they come on the car. 2nd pic is with the dull satin coating removed)
NONE of the "Aftermarket" wheels have this coating but instead have the "Chrome" finish " over the entire wheel including the barrels.

If you bought those from House Of Wheels, Bob is a strait shooter, knows wheels and would not lie to you.
And as far as the "Black" wheels in your other 2 links......... I'm not sure what process GM uses on these but I DO know the process for the GM Chrome wheels.
Note: that dull satin finish in the barrels will come off with lacquer thinner......I know because I've removed it from the Chrome wheels on my last (3) Corvettes and can verify GM has used the same chroming process (dull satin grey finish in the barrels) since the wheels on my 2010 ZR1.

 

I linked those pics to show how crisp the logo looks no matter what finish the wheel has, that's in direct opposition to the logo on the wheel I have that looks like it's nearly filled in with whatever was sprayed on the wheel.

 

Sent a pic to the vender, they confirmed in writing that my wheel, "looks like every ZR1 wheel I've sold since 2019."

So one of a few scenarios:

A. If all vender's wheels look like that then they are indeed selling factory 2nds. (either intentionally or they don't know better)

B. Vender originally told me that I'm simply wrong and don't know what I'm talking about, and now faced with photo evidence of what I have they're doubling down on that claim rather than admit a mistake was made.

C. Vender really doesn't know as much as they think they know and are making an *** of themselves by sticking to the story.

D. Factory is selling 3rd shift products as genuine and vender is not inspecting their stock before reselling it. (kind of leads back to point A.)

Vender has a good rep both here and on eBay, so I think some of these are more likely than others.

All I want is my money back and for them to cover return shipping. Product is not as advertised so I should not be out cost of shipping.
I was told wheels are new GM wheels bought directly from the factory in Mexico, but based on everyone here's opinion and photo evidence compared to product in hand, that's just not correct.

In the future I'll be sure to request pics of the actual products that will be shipped to me regardless of seller's reputation.

 

The wheels you shown are clearly OEM GM ZR1 wheels. The fact that the ZR1 logo is less defined on yours is probably due to the casting mold wearing out after many pours and/or thicker paint being sprayed over the casting. You can see the OEM markings. The OEM GM wheels are made by Ronal who makes aftermarket wheels fir MANY manufacturers and used to sell their wheels in the aftermarket (look up Ronal Bears--they are wheels in the shape of a Teddy Bear). It says Ronal in TWO places of each wheel in your pictures! The fact you don't recognize Ronal as a major OEM wheel supplier is very telling here.

Also, OEM ZR1 wheels are NOT "forged" in the traditional sense, they are "flow formed" which takes the casting and then final forms the wheel (after it is cast) using heavy rollers to its final shape. They claim it has the strength of a true cold forging without the high cost but I am not so sure. That is why the ZR1 wheels are heavy,

I can almost guarantee that if you return these and get another set, the ZR1 logo will be similar--and even if it is "sharper" does that make a truly better wheel?

And "all you want" is for the vendor to pay return shipping? Seems fair🙄 He is selling a Ronal OEM ZR1 wheel and because the ZR1 logo is rounder and less defined than the "stock photo" you found on the internet, he should prepay the $300-$400 shipping charge so you can return them? I know what I would tell you and it would have something to do with sand.

 

Thanks for your input. It was not just one stock photo in the Internet. It was also multiple other pictures of people (even on this very forum) showing that these logos were not up to standards. I know who Ronal is. I have a watch that says Rolex on it. I'll sell it to you for $500, sound like a deal? Don't assume what other people may or may not know.

That was not the only issue with them.
You can take a look at the pics I snapped showing 1 of the 4 to be a different color, and the scrapes and scuffs on these.
https://www.icloud.com/sharedalbum/#B135aVbMKaQN14

Meanwhile, the vendor did indeed take them back via pre-paid shipping so I'll consider the matter closed with one final warning.
When you buy from any vender where you can't inspect before you get the product, ask for pics of the actual items you're getting.
If they won't provide them, do business elsewhere. If they do and they look good, keep them for reference against what you get and if they don't match, don't settle because they're "good enough", it's your money and their reputation.

 

My opinion is the wheels you purchased then returned were OE GM wheels.

The ZR1 front ½-in wider, so that's part of the front whees' weight gain. Also, with the 20x12-in rears used on C6 ZR1s, some C6 ZO6es and some non-ZR1-C7s, wheels cracking and/or breaking near the inside edges of their barrels was common. The ZR1 rears are heavier probably because GM strengthened the design of that wheel to address those failures.

Beyond those situations, some of that weight increase may be additional strengthening to provide a wheel that is durable under higher lateral loads put on them by a heavier (curb weight plus up to 900-lbs downforce) car on PS Cup2 tires and higher acceleration loading you'd get from an engine making 715-lbs/ft torque (multiplied by the final drive ratio) and higher deceleration loading generated by carbon brakes stopping a heavier car from as much as 215-mph.

If you want lighter wheels in those sizes, you have to go to a premium forged wheel such, as a Forgeline, because you're not going to get the required durability from spun-cast, pressure-formed wheels that are, also, lighter that the ZR1 wheels.

Personally, I'd be deathly-scared using spun-cast wheels that are lighter than the GS 19x10/20x12 wheel combination on a car I was going to drive hard on the street or take to the track.

I put Forgeline GS1Rs on my '19 ZR1/ZTK. I also have them on my '12 ZO6/ZO7 which, BTW, had both its 20x12s fail with cracks on the inside edges their barrels.

 

I think you missed my point.
While disappointed a bit about the weight of the wheels, that was not my main complaint.
It was the quality of the finish on the wheels I received. They might have been genuine GM, but they weren't up to the quality I'd expect on a $100k car.
If they looked like they should have, I'd be driving around on them now instead of still shopping for wheels.

 

Well, I'll grant you this....your standards for wheel finishing are higher than mine. My spin on that is no one lies down on the ground and gazes at their wheels close-up. Had I removed the wheels and spent time examining them closely, I might have had some of the same reservations about their finish quality that you had, but I'm just not that deep into the whole wheel finish issue. If I stand ten feet from my car and like what I see and I'm confident that the wheels are durable, I'm happy.

My production ZR1 wheels were black and I neither cared for their style nor their weight. I also wanted to avoid any potential problems with the 20x12s cracking. They were not on the car very long before I sold them on the CF's C7 parts forum and put Forgeline GS1Rs on the car. That solved two problems: 1) the ugly look of the stock wheels and 2) the unsprung wt. that comes with OE wheels.

 

I don't know why you are so enamored with the Z wheels, but obviously that's your business. However, if the real things (OEM) are "flow-forged," which would be consistent with GM's other cost cutting shenanigans, the process is NOT the same as with fully-forged wheels. See the comparison weights of real forged aftermarket and what seems to be genuine OEMs above. Unless strapped for cash or married to the design, quality aftermarket fully-forged is always the way to go on sports cars. All the best, in any event.