Most bicycles come with all-around tires, designed to work well enough in most conditions.
When these wear out, the choice of tires seems endless. Hutchinson is a French company that has made significant inroads in the U.S. mountain bike tire market. The Alligator is one of their more general off-road tires. It is available in either an all black rubber, or as the Alligator Gold with a dual compound yellow and black tread. They weigh 625 and 640 grams, respectively.