Dirt bikes are typically categorized into three groups: off-road, motocross, and street.
Off-road bikes tend to have longer suspension travel, more durable components, high ground clearance, and a rugged frame geometry which allow them to withstand the rougher terrain found off paved roads or trails.
Motocross motorcycles are designed for speed with less focus on ruggedness so they are more lightweight and agile than an off-road bike.
They tend to be longer and heavier than street-legal counterparts with larger fuel tanks that allow them to traverse off-road over greater distances without requiring refueling stops.
Many dirt bikes also have a more upright seating position and wider handlebars to allow the rider to sit comfortably for long periods over rough terrain.Motocross motorcycles are lighter, more nimble, and designed for speed and agility.
They typically do not possess the durability and weight required to be ridden on unpaved surfaces like an off-road bike.