I forget the exact #'s, but the new Tundras studs are something like 16-18% larger in diameter than the older Tundra's 6 studs. This means, at least in theory that the new Tundra's studs are actually a little stronger than the old Tundra's 6 lugs system.

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2007 Tundra DC Limited 5.7L 4X4
TRD,NAV,TOW
Xlerator Exhaust
aFe Stage 2 CAI
BFG AT/KO 285/65/18
Desert Sand Mica