UPDATE: I took everyone's comments into consideration, talked to the boss about everything, & after 45mins we convinced the customer to put on the correct size, which were 235/60/17s : r/Justrolledintotheshop
Cooper Evolution HT2 235/70R16 106T Passenger/Truck/SUV Tire - Yahoo Shopping
1 235/70/16 All Season Tires for sale | eBay
Tusk Terrabite Radial Tire
Yelnicom Niš - 235/70 R16 KAMA 221 109S
Auto Vehicle/Passenger Rollback Tires Event (various brands/sizes)