Thought I'd weigh in with my results.
Mine are wearing EXACTLY the same as Volcom370z's are. Got 6,700 miles on them, tire pressure is 38 psi. Measurements taken from outside to inside - in 32nds:
the front treads measure: 5,8,8,8.
The rear treads measure: 5,7,7,8 (maybe should drop these to 35 psi?)
I think the wear is good considering both front and rear are wearing the same and evenly, and the Z handles great.
But if I remember correctly, in New York, once any tread reaches 3/32, the tire won't pass inspection, even though most of the tire has a good 6/32 of tread depth left. I don't know this for sure, because I always replace well before 3/32 anyway on any car I drive. Being safe is non-negotiable for me.
However, especially with such wide tires, 4/32 or 5/32, especially on a car like the Z, could be dangerous on wet roads, so for a 1 or 2/32 loss of tire life, I'm not complaining.
I went into the Z knowing I'd be buying lot's of tires!
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