[ptmcc]

If manufacturers in general were serious about improving efficiency they'd stop putting huge heavy wheels on everything, instead of chasing fractions of a percent with overcomplicated and failure-prone door handles.

Side bonus, smaller wheels with taller sidewall tires are more comfortable, less prone to damage, and the tires are cheaper and easier to replace, too!

[rale00]

Alloy wheels are pretty light, and the weight mostly affects acceleration.

At speed, most of your power is going to fight drag, so aerodynamics make a much bigger difference in efficiency.