Ready to go onto the bike trails with a bike that is comfortable, durable and safe. Our Decathlon Rockrider ST50 Aluminum Mountain Bike, 26", 21 Speed, Black, Medium is designed for your first mountain bike ride in dry weather for up to 1hr:30 min. Our ST520 Mountain bike is 21 speeds. The Bike frame can hold a bottle cage, saddle bag, mud guard, stand, and pannier rack. To make sure that you are always comfortable, the frame with a raised position for a straight back, the 80 mm suspension, the exclusive ergonomic saddle in the shape of a hammock. Soft touch grips and a height adjustable stem Enjoy the comfort and durability of the ST 50 mountain bike. Lifetime warranty on the frame!