Like so much on TV right now, “Tires,” Netflix’s latest sitcom, is fine. The six-episode comedy series follows the checked-out employees of an underperforming auto shop. Created by Shane Gillis, Steve Gerben and John McKeever, the show endorses and shares its characters’ laid-back approach to life and labor. The humor is broad (think bored dudes making crude sex jokes at work). The premise is simple. And the stakes are slim to nonexistent. The crisis of the first season is that Will — the owner’s nervous failson, played by Gerben — ordered too many tires in his capacity as branch manager.