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Looking for feedback on people’s experience with Forgeline wheels. I currently have 18x12.5 GA3R’s on the rear and 19x10 GA3’s on the front. After having the car aligned, rear tires road force balanced twice and the fronts road force balanced twice along with replacing the tires with brand new Michelin Pilot Sport AS/3’s I’m still dealing with a pretty bad hop at 40-50mph and a horrible vibration with anything about 65mph.
Im currently still using the factory lug nuts and was told they may be the culprit. I just spent $350 bucks from the dealership after they took the time to rebalance all the tires and even took wheels off a brand new 2019 ZO6 to verify they were the problem. Vibration/Hop was gone once the wheels were swapped.
Last edited by CamOnlyJabroni; 06-15-2019 at 08:49 PM.
Looking for feedback on people’s experience with Forgeline wheels. I currently have 18x12.5 GA3R’s on the rear and 19x10 GA3’s on the front. After having the car aligned, rear tires road force balanced twice and the fronts road force balanced twice along with replacing the tires with brand new Michelin Pilot Sport AS/3’s I’m still dealing with a pretty bad hop at 40-50mph and a horrible vibration with anything about 65mph.
Im currently still using the factory lug nuts and was told they may be the culprit. I just spent $350 bucks from the dealership after they took the time to rebalance all the tires and even took wheels off a brand new 2019 ZO6 to verify they were the problem. Vibration/Hop was gone once the wheels were swapped.
What offsets are you using on the Forgelines? If stock wheels don’t have an issue and your Forgeline set up does, there must be an issue with the Forgelines mating flush with rotor and hub. Since the C7 has factory wheel studs, perhaps they arent long enough of your running a very aggressive offset.
What offsets are you using on the Forgelines? If stock wheels don’t have an issue and your Forgeline set up does, there must be an issue with the Forgelines mating flush with rotor and hub. Since the C7 has factory wheel studs, perhaps they arent long enough of your running a very aggressive offset.
I would have to ask Ben@WeaponX. That’s who I bought them from. Ben is the one that also suggested running a gorilla brand lug nut over the factory lug. They road force balanced fine but then feel like they hop. That makes me inclined to go along with what you’re thinking. They aren’t mating to the hub/rotor correctly.
Carbon ceramic brakes? If so look at the rotor mounting face and the insert in the wheels. The CCB rotors have a dish to them and some wheels don't mate with the dish and instead just sit on the lip of them which keeps them from torquing down properly.
Carbon ceramic brakes? If so look at the rotor mounting face and the insert in the wheels. The CCB rotors have a dish to them and some wheels don't mate with the dish and instead just sit on the lip of them which keeps them from torquing down properly.
Thanks for the suggestion. I don’t have carbon ceramic brakes. I wouldn’t think Forgeline wheels would need a hubcentric ring either as a potential culprit.
I wonder if maybe the pitch of the lug holes on Forgelines are different than factory which would call for a different style lug than factory?
Last edited by CamOnlyJabroni; 06-15-2019 at 09:56 PM.
I've had a few sets of Forgeline wheels (including GA3R's). I've always used McGard spline drive lugnuts and have had no problems. As mentioned before, I'd definitely make sure the wheel is sitting evenly and flush with the hub.
OP, when you torque the lug nuts tight, do they feel like “click” tight or does it feel like a few of them don’t tighten properly? If a few lug nuts stay “loose” it indicates the wheel/rotor/hub interface isn’t flush.
Did you have them balance the wheels without tires?? That would give you the answer right there. You also could easily check runout also. A bit of bother but a lot easier than worrying about the problem. Might as well make sure it is the wheels.
The mounting flane on my Forged Wheels were 100% Flat and didnt have the recess that OE Cast Wheels do.....so the lock washers holding rotors on interfered with the wheels being flush with the hubs ...............
I've had a few sets of Forgeline wheels (including GA3R's). I've always used McGard spline drive lugnuts and have had no problems. As mentioned before, I'd definitely make sure the wheel is sitting evenly and flush with the hub.
I will pull the wheels back off and check how they mate to the surface of the hub.
Originally Posted by BLK06ZO6
OP, when you torque the lug nuts tight, do they feel like “click” tight or does it feel like a few of them don’t tighten properly? If a few lug nuts stay “loose” it indicates the wheel/rotor/hub interface isn’t flush.
they all tighten down fine.
Originally Posted by pkincy
Did you have them balance the wheels without tires?? That would give you the answer right there. You also could easily check runout also. A bit of bother but a lot easier than worrying about the problem. Might as well make sure it is the wheels.
i didn’t try this yet. I just had all four roadforce balanced multiple times.
Originally Posted by CamarosRus
The mounting flane on my Forged Wheels were 100% Flat and didnt have the recess that OE Cast Wheels do.....so the lock washers holding rotors on interfered with the wheels being flush with the hubs ...............
I never checked this. I know my wheels are completely flush like you’re saying though. What did you do to alleviate this problem?
I would be VERY surprised if the wheels are the problem. Call Forgeline and talk to them. They have excellent customer service.
I’m working with Forgeline now. Im going to send them my wheels and tires. The wheels being the problem was my last thought. That’s why I never assumed it was the wheels to begin with. There is still a possibility that they are. Steve assured me they would figure it out one way or the other.
I have modded cars since I was a teenager so I know how it goes sometimes. Car holds the garage floor down 2 1/2 seasons of the year anyway plus it’s only 1 of 4 toy cars. I’m just cruising around in my Scat Pack while it gets upgrades and the wheels sorted.
Last edited by CamOnlyJabroni; 06-18-2019 at 02:05 PM.
06-15-2019, 06:34 PM
Forgeline GA3R/GA3 Vibration/Hop
