Just got new rear tires, kumho spt 275/30/R19 but still have the stock potenza on the front with 6/30sec left. I noticed traction control randomly kicking in, and aggressively too (completely shutting power off), not like it did before. I was coming off a turn ramp connecting two highways, doing around 80 what i normally do, but it felt weird and of course right after the ramp was done and coming to the straight away, traction control randomly kicked in but for a fraction of a second. This is not normal compared to the old stock tires I had. The old tires did have a bad tire ware pattern, and i never had my alignment done, or could it be a need of a ecu reset? Without traction control on, it runs great. So far 100 miles done.

 

Turn the traction control off then

 

Have the alignment checked at your dealer. There is a thread if you search of Nismo's having a slight alignment issue. Mine was fine. I'm not familar with the tires you are using. Post up a pic of the tread design....

If your a confident driver aka one with track experience or mountain run experience with Z's then I recommend turning the traction control off. If I am driving agressively I always have mine off.

Also allow sometime for the new tires to break in.

edit: Also take into consideration the colder temps. The tires just may not be gripping due to tire & surface temps.

Zim

 

My guess would be, because the overall diameter of the 275/30/19 you put on is smaller than (or too close to being smaller than) the overall diameter of the front 245/40/18, the traction control is thinking the rear wheel is spinning faster than it should be.

 

+1

The stock rear tire is a 35....a 30 tire is too short.

 

I had new tires (Hankook) mounted this summer and I took them on a break-in drive. I also had some slippage and the light came on the first few miles. After that, no problems.
Like someone said, break them in first.

 

Thats like trying to cheat death when you turn it off!!!!