After speeds of 65+ I get a lot of rattling, and it seems unstable, compared to OEM. I'm dropped on Tein S-Tech for 350z, and have tockico shocks; and a rear camber kit. I have 285/35/19's in the rear and had my fenders rolled. The rattle seems like it is coming from the rear. I had the alignment done, but I just don't know what the problem is...go figure.

If I went back to my old setup of 275's in the rear, would that cure anything? Someone let me know.

Thanks

 

Changing to a more narrow tire most likely won't fix a rattle. And by rattle do you mean some sort of plastic or metal clanging together noise? My suggestion would be to inspect your rear camber arms.

 

Was your camber adjusted for your 275's or your 285's... That could be it.

Also are they both 35 series tires?

Just a few of my thoughts without thinking too hard

 

If everything was reinstalled properly, there should be no new rattles.
Was this a DIY or by a shop?

 

Ya check the camber kit maybe who aligned it didn't tighten the adjustable arm , and ya what did they adjust the camber for the 275 or 285 tires

 

i would double chek the install

 

Something might be loose? Yea check the install..

 

When I first put on my Z springs, for about a month when going at high speeds (80+), it felt like the car was "hunting" all over the road. It was very scary. When the springs finally settled and I got the toe set in the front, it was fine. As for the rattle, look for something loose.