16x6.50-8 4 PLY TWO UNUILLII LAWN MOWER TRACTOR PAIR TWO 15-6-6 TURF LAWN TRACTOR MOWER HEAVY DUTY 4 PLY Tread Sidewalls Nylon 2 plies THESE ARE TUBELESS TIRES - - NO EXTRA COSTS IT IS 4 PLY .Load Range B max load 820lb & 28psi