Which tire has the highest Treadwear (UTQG) in size 235/30R22

It's time to buy new tires for my car, but I want to buy a tire that lasts longer than the original brand, OEM. Which tire has the highest Treadwear in this size 235/30R22?


420 - Treadwear

 Atturo AZ800 - UTQG: 420AA - Tire Rating: 4.38


360 - Treadwear

 Nexen N7000 - UTQG: 360AAA - Tire Rating: 4.75


320 - Treadwear

 Kumho Ecsta SPT KU31 - UTQG: 320AAA - Tire Rating: 4.17