Lately me and my sport tuning mechanic have been going crazy trying to figure out why my car has been vibrating at the steering wheel as well as with the passenger seat while driving between 55 to 70 mph. Im not sure if any other OEM wheels have this issue, but if you have an 07 or 08 G35 Sedan Sport with G37 coupe wheels and have the sudden interest in putting hubcentric spacers on your car, it will vibrate!!! Its not your wheel ballancing...and its not your allignement!...It simply comes down to one thing, and thats the type of lug nuts you put on your car. Please dont make the mistakes I made in the past by going through the loop holes in figuring out this annoying issue. Hope this helps others with the same problem

 

so what kind of lug nuts should we get to avoid the vibration??

 

i do not believe the spacers are the cause of the passanger seat vibrating/shaking at highway speeds. in my car, as well as with every other g35 sedan i have driven so far, the passanger seats vibrate at highway speeds as long as no one is sitting in it.

 

my passenger seat doesn't vibrate at all at any speeds.... though my rear deck rattles at certain speeds when going over little imperfections in the road...

 

I have the G37 19's on my G sedan also. But have no spacers. and used the Lug nuts from my Stock 18's. and everything is fine at any speed. But I don't have spacers like you have. I think the rims sit perfect without the spacers!? Why do you want to make the 19's come out more? I think it would stick out too much with spacers?? But thats just me.

 

get an alignment...

 

i have an 05 coupe with oem 18s. no spacers.
the same thing was happening before.
It was vibrating everytime i go over 60mph.
the vibration goes in a sequence, every 2 secs it vibrates.
I installed the wheels my self, when i switched from 19s to stock 18s.
I went to the tire shop and when i (again) was trading with another oem 18s but powdercoated gloss black, after the switch it doesnt vibrate anymore.
So i figured that it must be the need of tire balancing or maybe the time when i installed it myself, the front tires does not match the tire rotational(arrow) on the rears.

 

umm- did we ever figure out what lugs the OP switched to resolve the problem??

 

+1. Hans, any input would be greatly appreciated on this. I have Ichiba v2's on my stock sport 18"s and am getting crazy vibration (you can see my recent post in the tech section) from about 50-70mph. Had a balance and alignment to no avail.

 

*bump*...anyone else with spacers, recently balanced, recent alignment, have hubcentrics, new tires, new wheel bearings, torqued and re-torgued all lugs....still get the shakes?

I'm beginning to think it's the compression rod, or the lower control arm bushings.