Available only with the Pedal Bike.
 
This kit includes 2 extra interchangeable rear sprockets (17 teeth & 15 teeth) to match your child’s growing strength and confidence. The 19T sproket is included with the pedal bike and is perfect for easy learning. But the 17T sproket will be usefull when they grow confidence for more fun, and the 15T to unlock top speed when they’re ready to fly.