First Track Day Question: How much tread is ok?
 

Heading to my first track day in a few weeks, and I know I need to replace my back tires. The front seem ok, but I attached pics for commentary.

The question is: How much tread should I be looking for when buying used tires?

I'm not looking to buy new tires for my first track day. I figure I'll spend a few bucks on used, beat them up, then move on from there.

Thanks for your help.

As long as you don't get rain you should be fine.

Thanks !