Founded in 1895, Schwinn is an American icon, building some of the best known and best loved bicycles of all time. From its very beginning in Chicago, Illinois, the Schwinn mission has been to develop bicycles that allow people to experience the confidence and freedom that comes from riding a bike. The Schwinn Bonafied Mountain Bike features an aluminum mountain frame and a powerful Schwinn suspension fork that soaks up bumps and thumps to provide you with a fun, durable riding experience. 24 speed Shimano EZ Fire trigger shifters and front and rear Shimano derailleurs make gear changes easy and smooth. Front and rear mechanical disc brakes provide crisp all condition stopping out on the trail. Durable Schwinn alloy cranks provide steady gearing and less pesky maintenance. High profile double wall alloy rims are light and strong for added durability. 2.25 inch wide knobby mountain tires are ready for bumpy terrain. This bike ships ready to be assembled. The wheels measure 29 inches.