Gas mileage decrease much going from 18s to 20s wheels?
 

Anyone notice a big drop in gas mileage upgrading to 20s?
My gas mileage is already pretty bad with a 4.8l running on 18in star spoke 209, but always loved the look of 20s and the aggressive staggered look.

I would guess about a 1 mpg loss. Those 20's are fat and have more rolling resistance.

yeah about 1 or 2mpg in my experience

alright thanks guys