A mountain bike is a type of bicycle designed specifically for off-road cycling. It features sturdy frames, wide tires with deep treads, and suspension systems to absorb shocks from rough terrain. Mountain bikes are built to handle steep hills, rocky paths, and uneven surfaces, making them ideal for trails and mountainous areas. These bikes come in various styles, including hardtail and full-suspension models, catering to different riding preferences. Riders often use mountain bikes for recreational purposes, competitive racing, or exploring nature. Accessories like helmets and protective gear are recommended for safety while riding in challenging environments.