2010 Toyota Prius Owners Manual - Page 595

6-1. Specifications Typical DOT and tire identification number (TIN) DOT symbol* Tire Identification (TIN) Number Tire manufacturer's identification mark Tire size code Manufacturer's optional tire type code (3 or 4 letters) Manufacturing week Manufacturing year *:The DOT symbol certifies that the tire conforms to applicable Federal Motor Vehicle Safety Standards. 574