Help your young ones learn to ride safely by installing the Wald 16/20 Training Wheel on their two-wheelers. Wald has been making bicycle accessories right here in the USA for nearly 100 years and their training wheels are carefully crafted for easy installation and excellent reliability. Wald Training Wheels are adjustable and fit children's bicycles sized 16 to 20 inches so you can move them from bike to bike as your kids grow, too.