Mountain
If you want to ride on unpaved roads or down dirt trails, then a mountain bike is what you'll need. Mountain bikes are intended solely for off-road use in rugged terrain, but are often used on the road due to their popularity and low cost. The frames and components are stronger and more rugged than those of any other category of bike. Tires are fat and knobby (aka aggressive tread) and they have a flat profile handlebar for handling and very low gears for easier hill climbing. Included in the category of mountain bikes are different varieties ranging from the entry level bike for the beginner to the fully loaded durable full suspension bike for the hard core rider.