Vehicle Compatibility: Thunderbird LT Radial and bias-ply replacement sizes for the 09 to 10 Harley Davidson Fat Boy and FLH Touring family Soft compound for high grip allowing to exploit great torque output with total control Machine specific carcass construction for exceptional riding comfort and stability at all speeds, even under heavy load Tread pattern design with offset central grooves alignment providing very high mileage for never ending riding fun.