So, I recently scrubbed my chrome OEM wheels like an idiot, and I am possibly looking into switching to 16 inch smoothies.

Currently I'm running on seventeens and I was wondering how this kind of change will affect the car. Things like the abs, traction control, stability control, and TPMS. What tire should I use? Is this even worth it on a car with 102000 miles (165000km)?

 

So long as the tire circumference is the same then you should have no issues.
I run the BF Goodrich Advantage T/A s 215/55R16's

 

are those stock rims OldBlue with baby moon insets??

 

No they are Wheel Vintiques rally rims with baby moons.

 

the 16inch Wheel Vintiques rally rims
with baby moons will work just fine.
I have a set aswell for my Hhr and i
run my 17's in the winter time ~

 

I do the opposite, I run 17" in the summer and 16" steel in the winter, with no issues. Just be sure the diameter of the tires are the same as mentioned and the computers wont know the difference.

 

yea i need to run my multi hole steels in the winter
and leave the 17's off,but they are scratched up any ways.!