Kinda-sorta, but it'd depend on how finicky you are, and what bike you're talking about. A "real" road bike will often be built only to take narrow, high-pressure road tires, so a wider, softer...
Yes... all terrain means all terrain in snow,mud,sand etc...
nope. not the X anyway... mine came with pizza cutter tires(super skinny)
Michelin or Bridgestone.
All The Best, the greatest hits album by Tina Turner, released in November 2004