Will this work? or will the wheels not being the same size affect traction control?

 

Of course it will work. If you want, put 20 inch wheels on the front and 17 in the rear.

 

This will work. Nissan is supposed to be putting 19" out back and 18" up front , so the set-up should work fine. Take time thinking out the width of the rims and the offset and you will be fine. Rememeber the wheels come staggered from the factory to induce understeer. This helps with the handling. I currently have 19x 8.5 up front & 19x10 in the rear. My tires are 275/30/19 out back & 245/35/19 up fron. My only mistake was the offsets. They are ni the hi 20's up front and low 30's out bakc. The rims are to far in for my liking, but I will change them ASAP. Hope this helps.

 

Yea Kinesis sent me a spec sheet to have the measurements done since I do not have a stock bodied 350z (6" wider on each side than a stock width Z). Thanks a lot guys I plan on have the 20s and 19s with the Kinesis K29Rs and the sides of the spokes painted to match the color of the car (either Black or DB). Thanks again for answering my question and in such a fast time.