[CargoBoatTails]

This is a really annoying argument that defies the laws of physics. Rather than make my own independent claims I'll use an elementary example of a currently mass produced econobox that comes in different trims, ie the Ford Fiesta HB manual. If you get the 205/40/17s the epa rates it at 26/35mpg, if you get the 195/50/16s the epa rates it at 28/36. Now go argue with the epa that the bigger tire should have gotten better mpg and stop telling naive people bigger tires get them better mpg, ridiculous.

And anyone involved in racing knows you need to make less pit stops with a lighter tire.