Which tire has the highest Treadwear (UTQG) in size 265/40R21

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 265/40R21?

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360 - Treadwear

 Continental Conti4x4Contact - UTQG: 360AA - Tire Rating: 3.94

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280 - Treadwear

 Continental ContiSportContact 2 - UTQG: 280AAA - Tire Rating: 4.46

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240 - Treadwear

 Continental ContiSportContact 5 P - UTQG: 240AAA - Tire Rating: 0

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