Hello,

I recently got my stock touring re040's replaced with 235/40/18 90W and 255/40/18 95W continental extremecontact tires (all season), front and rear respectively.

there is considerably more body roll around corners...can this be due just because the tires aren't as sticky? can sway bars correct this and if so, do i need to get both front and rear sway bars?

thanks

 

Maybe the tires grip better so you are able to take the corner faster, which causes more body roll.

 

Check the inflation of the tires. Different tires have different feel also.

 

I second that !

 

looks like you went up one size width front and rear..right? If so, you are essentially putting a wider tire on your stock width rim. This is causing your tires to bulge off the rim, and hence, you have softened the sidewall. So in the corners, the sidewalls are folding on themselves. Hope that makes sense...or correct me if my assumptions on your wheels was incorrect.

 

I noticed the same thing replacing my OEM rears with new RE040s at OEM size. The reason I went with RE040s is because I wanted my tires to match the fronts that were recently replaced under warranty.

The rear feels like it's rolling more than it used to. Hopefully it will go way after I wear the rears down a bit.
--
Jeff

 

Body sway is caused by soft suspension and tire sidewall flex. Since you didn't change the suspension the Conti's probably have a softer side wall.

I used to run Michelin on my 300ZX and tried a Pirelli once and noticed a lot more lean.