The semi-float design supports both the vehicle's weight and load as well as transmits rotational driving force to the wheels. This is pretty common for a 1/2-ton truck, but makes us wonder if a full-floating version is in the wings for a 3/4- and 1-ton truck. Here is one thing we're confused about. Why did Toyota use a new 5-on-150mm (5.9-inch) bolt pattern? Toyota 4x4 trucks have always been six-lug, so why go to fewer lugs for their biggest truck ever? The aftermarket choice of wheels for this Tundra is going to be rough we would assume. However, we do like the big 18-inch wheels on all the Tundra models because it means there are brakes so big underneath that nothing smaller would fit.