Employee: "Hi, how can I help you?"
Me: "I need new tires. I think the rear ones are fine, but definitely the front need to be replaced."
Employee: "Let's go look."
*employee looks at tires*
Employee: "See, the back ones look OK. A few weather cracks, but not too bad. The front ones should be replaced, though. I can't just rotate them."
Me: "Yes. I need new tires."
Employee: "Yeah, you'll have to replace the front ones. I can tell just from looking at them."