Thanks for that Jay. A coworker let me borrow their tire depth gauge and I referenced the manual for tire depth replacement recommendations and saw the wear indicator arrow you posted. Manual recommends replacement when rear tread depth measures 2.0mm in the center, and 1.5mm for front tire. Both of them were really close to both those numbers which is shocking to me...with only 6.2K on the odo. Guess I'll be getting both replaced before the trip.