Which tire has the highest Treadwear (UTQG) in size 185/60R13

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 185/60R13?


680 - Treadwear

 Kumho Solus KR21 - UTQG: 680AB - Tire Rating: 4.5


400 - Treadwear

 Kumho Solus KH17 - UTQG: 400AA - Tire Rating: 4.16


340 - Treadwear

 Kumho Solus KH15 - UTQG: 340AAA - Tire Rating: 4.18


320 - Treadwear

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