Noticed a little loss in the mpg, but it's not a daily driver so I don't have good numbers to compare it to, just seems maybe .5 to 1 mpg and it takes just a little more skinny pedal to break them loose. Ride quality is about the same to me, they do have more road noise, but nothing compared to a m/t. I think i'm soon going to invest in a dual steering stabilizer as the bigger tires do wander a little more when hitting bumps and pot holes. I'm working on the picture situation so hopefully soon.