Just as the name implies, the BikeHard 12-20 Training Wheels are completely adaptable to bicycles with wheels ranging from 12″ to 20″ and everything in between. Tough construction is apparent throughout all components: wheels, stabilizers, and hardware are made to handle the abuse of rough kids. Lightweight, adjustable, and durable, they are everything that one could ask for in a set of training wheels that can be handed down from child's bike to child's bike.
Features

• Compatible with wheels from 12″ to 20″
• Heavy Duty steel brackets
• Heavy duty steel wheels with 1/2 inch rubber