This is my first time getting new wheels & tires for my Z. I'm picking up some 19x8 +20 offset fronts and 19x9.5 +20 offsets rears with 235/35 and 265/30 tires. Should I be in the clear from affecting the TCS?

 

Q: I bought aftermarket wheels and didn't move the TPMS sensors to the new wheels. What's up with the warning light (!).
A: After about 30 minutes of continual driving, if the system doesn't detect a signal from the four sensors, the warning will beep and the dash light (!) will illuminate. You CAN'T disable the warning or the light. Neither Nissan or any shop can disable it (it illegal if they do it).

You will need to transfer the sensors from your OEM wheels to the new ones. The band method seems to work well.

 

TCS = Traction Control System
TPMS = Tire Pressure Monitoring System

They're not related.

 

I get a light after about 1/2 hour of constant pace driving like the highway. I never get the beep though thank God. That is the most anoying sound ever.

 

Nope, your front tires will be taller than the rears. That's a definite no-no.
Fronts = 25.5" OD
Rears = 25.3" OD

Check out this post...
https://my350z.com/forum/showthread....1&postcount=45

 

Thanks! I kinda figured that but the sales person tried to sound like he knew what he was talking about. A red flag came up when I asked him for a 275/35/19 for the rear & he said he didn't think they made them that big.