and of course they slow acceleration and hurt gas mileage as the rolling weight is greatly increased. Also when I switched my wheels there is a 15% difference in circumference so when my truck said I was going 60, I was really going 69 mph. It also made it so my mileage is 15% lower than it really is as well, thats a plus! So havign 20K miles on my odometer means I really have 23K miles on her, but nobody will ever know that.
So yes it hurts performance, breaking, and acceleration ... but they sure look cool!
