help! stock non sport 370z negative camber wear on rear tires

TreeSemdyZee

Oddly enough, mine with S.P. is wearing on the outside, not the inside.
The Z is set with more negative camber from the factory. This is one of the features that contributes to better handling and quicker turn-in response. Unfortunately, it also cause uneven tire wear.
The 350s were worse. After about 20K miles, mine would vibrate horribly between 25 and 30. Once I replaced the tires, it was fine.

I wouldn't "babysit" the tires. Get a good tread depth gauge and check the depth every 5 or 10k to see if there is major uneven wear. Or. You could take it to a tire store and get a free alignment check to make sure of the numbers.