The Redline MX Junior is the perfect entry-level BMX race bike for the beginning youth racer who is 4’6” to 5’1” tall. Made with an aluminum frame and integrated head tube, the Redline MX Junior is lightweight and easy to maneuver. The MX Junior features high-quality 155mm 3-piece aluminum cranks, integrated headset, 20 inch wheels, and an integrated saddle and seat post combination for weight savings.