I have an 05 Z, with 15K miles on it. The rear tires are pretty bad, but the fronts are not so bad. Is it ok to replace just the rear tires with a different brand tire? or should I just replace them all..

I have bridgestone potenza all the way around right now, thinking about replacing the rears with falkens.

 

You CAN replace them with something different but you might find the car handles squirlly. It's can be really noticible when traveling in a straight line down a old road with ruts worn into it.

This has been discussed in another recent thread...

https://my350z.com/forum/wheels-and-tires/367445-different-trend-for-the-front-and-rear.html