285/65/18 only reguire alittle trimming,, 1-2 inches took 5 min with a rotary tool. Speedo is 2 mph at 40 about 21/2 mph at 50 and 3 mph at 60 prob. 4 at 70 . I just ignore they wont ticket you for that . maybe not recommended width but looks good .Heavier yes can't tell in performace brakes are 4 disc no problem. Love the size minimal draw backs.as so far.