Which tire has the highest Treadwear (UTQG) in size 215/55R18

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 215/55R18?


800 - Treadwear

 Continental TrueContact - UTQG: 800AB - Tire Rating: 0


600 - Treadwear

 BFGoodrich Advantage T/A Sport - UTQG: 600AA - Tire Rating: 0


500 - Treadwear

 Nexen CP672 - UTQG: 500AA - Tire Rating: 4.57


480 - Treadwear

 Nankang SP-5 - UTQG: 480AA - Tire Rating: 4

 Bridgestone Ecopia EP422 - UTQG: 480AA - Tire Rating: 0


440 - Treadwear

 Goodyear Eagle GT - UTQG: 440AA - Tire Rating: 4


420 - Treadwear

 Nexen N5000 - UTQG: 420AA - Tire Rating: 4.55


400 - Treadwear

 Continental ContiProContact - UTQG: 400AAA - Tire Rating: 4.23