12 Sport Strider Bike Join the strider family: Meet the bike that set the world on fire and revolutionized the way kids learn to ride. The 12 Sport is our all-around fun factory. Children as young as one are experiencing the thrill of riding on two wheels before they’re out of diapers. Grows with your child: The seat and handlebar heights adjust to accommodate ages 18 months to 5 years, or a 12 in. – 20 in. inseam (no tools required). The 12 Sport is perfect for future upgrades like a foot brake or heavy-duty tires. Designed for young kids: Weighing in at only 3.0 kg (6.7 lbs.), the 12 Sport makes it easy for your child to ride and stride. Mini-grips mean little mitts can easily take control and make this lean, mean, durable bike the biggest bang for your buck, which is probably why it’s our best seller.