What is the 2018 Toyota Tundra's lug nut size?

Across a number of configurations, the 2018 Toyota Tundra will come with either P255/70R18 tires, or larger P275/55R20 tires. These sit atop 8Jx18 ET60 oR8Jx20 ET60 wheels, respectively. Each variant has a bolt pattern of 5x150 with a 110.1mm center bore. That "5" indicates that You'll have five lug nuts per wheel. Each of them must be torqued to spec, which is 131 Nm in this case. Each has a hex head measuring 22mm across, and has thread that measures M14 X1.5. The hex size may vary slightly if aftermarket units have been installed, but they should usually measure 22mm or 7/8". This is a common size found on many lug wrenches, so You should never be without options for removing or replacing the tires.