[Hersbird]

A bigger tire is going to be heavier and all rotating mass which is 10 times the penality of static mass. So if you put bigger tires on your stock rims and add say 10 pounds per tire it is equal to carrying around 400 pounds in the trunk. Once up to speed on the highway it may not be a penality but around town stop and go it will hurt. Same thing going to larger wheels even if keeping the overall tire width and diameter the same as the bigger rim/lower profile tire usually weighs more then the smaller rim/higher profile combo. 20's look cool and my handle better but they hurt acceleration.

Although if I had a one ton duelly diesel for a 5th wheel camper I would consider going to a 255/60-22.5 on Alcoa wheels for the 120psi semi low rolling resistance and heavy load carrying ability. They are only an inch taller and slightly narrower then a common 275/75-17 found stock on many 2000s Chevy's.