Been having this vibration issue ever since I got my car back from the shop. I'm almost positive it's the rims but I've done everything to rule out any rim-related vibration issue but it is still there but nit as bad.

So far I re balance the wheels and checked them for any imperfections. Also installed hub centric rings and it improved a little but there is still a noticeable vibration after 60 mph. Before it used to vibrate very bad after 30 mph but now not as bad. still annoying as hell.

What else could it be? Out of balance drive shaft?

 

Could possibly be your alignment is out of whack....That was my past experience, and the problem I am having now, will see if I can solve my issue when I install my camber kits and have her re-aligned

 

I had the same issue when I had new wheels installed. Had the alignment done then did a road force balance and found out the tires had high spots that was causing a "radial hop". So I got new tires and it helped a little, then I changed the hubcentric rings and still had the issue. Unfortunately my problem was the rims so I sent them back. Try the road force balance and see if your tires are bad.

 

^+1 Get your wheels road forced.

Any chance you used fix a flat or slime in 1 of your tires? That will cause the issue as well.

 

Rims and tires are brand new.

 

Even new tires can have issues with one part of the tire being stiffer than the rest. This is what the road force balancing detects. Also might want to verify the wheel offset is proper - this should be listed in your wheel specs.

 

+1 you should get this done

 

20x8.5 +25
20x10 +30

I'm gonna try this weekend to get them road forced.

 

Size & offset sound like they are at least in the ball park. Is the vibration coming through the steering wheel (front wheels) or through the seat/floor (rear wheels)?
No problems with the old wheels & tires?
How many miles on car?

 

Definitely the rear, the steering wheel doesn't shimmy. I have 24800 miles and about 1000 miles on these new rims/tires. The car didn't vibrate with the stock rims.

 

How bad is the vibration? Sounds like its just the rim/tire setup. Ever since I switched to aftermarket rims, I always feel a slight vibration over 60mph. It's real subtle though.

 

How bad? Enough to annoy me and my gf. It's most noticeable on very smooth roads. I'm gonna try and road force balance them this weekend. I'll keep you guys posted.