A "Hardtail" refers to a type of mountain bike that features a solid rear frame without a rear suspension system. This design provides a more direct connection to the ground, making it efficient for climbing and riding on smooth trails. Hardtails are generally lighter and simpler than full-suspension bikes, which can make them easier to maintain and more affordable. Hardtails are popular among both beginners and experienced riders for cross-country and trail riding. They offer good performance on varied terrain while allowing riders to develop their skills. Many riders appreciate the increased pedaling efficiency and the ability to feel the bike's handling more directly, especially on climbs and flat sections.