you said feisty rear end.

 

^I loled.

 

as aforementioned the added grip you obtained from the larger rear tires have made the car less likely to rotate (read understeer) For instance the CR also comes with 255s stock yet added larger sway bars to compensate for the additional mechanical grip of the stickier tires.

 

The azenis stick like crazy! It would take a lot to brake the rears loose. Like it was mentioned above either go with a stiffer sway in the back or simply change to 245's in the rear.

 

don't mean to thread jack, but if somebody can just throw out a quick answer it'd be great.

do 255's fit well on stock ap2 rears?

 

yes.

 

zoomie, if your car is lowered, 255s will need a bit of a fender roll and/or lipping.

 

RT-615 are junk. Much better tires out there.

 

Agreed. My old AP2 was the most tail happy when I had 255 rt615s on the rear.

 

Not with stock AP2 wheels.