How long are Nittos good for?

[NEEDA5.0]

I'm at the tread indicators now but I'm not running them on the street. So, I'm just wondering how much further I can go before they become dangerous for track use only.

 

[gopher_6_9]

for track use only you still have several passes left dependong on how much you burn them.

 

[90mustangGT]

I guess when there is no tread left, but when it gets down the 2/32nds, that is where the tread indicators are set, so technically, they are not legal.