Originally Posted by CSA0890

Hey guys I need some help. Im not sure if this is in the right section so move it if its not.
I just got some Nitto Invos in 285/35 19 on the rear with the stock potenzas on front and it has really bad fishtailing going on at 40 and above. It gets way worse the faster I go and is so bad by 80 that its pretty dangerous feeling.
I took it to the dealership and they put on some front wheels off another Z with S.P. and it cleared it up 99%.
They also suggested the rears were wrong for the car not being the right size and also the Invos were meant for the Z
Any suggestions as to what the issue is? I really dont want to keep the Invos on if they are also to blame but dont want to replace the fronts unnecessarily because they still have 50-60% of the tread left.
Sorry for the novel.