Stabilizers, or training wheels, help children get comfortable on a bike, preventing them from falling over and letting them focus on braking, steering, and speed. Statistically, kids will learn to ride a bike without any extra stabilization anywhere between 4 and 9 years old. There’s no set age at which training wheels should be removed, so you’ll want to monitor your child’s confidence on their stabilized bike and look for signs they may be ready to remove the supports.