Wheel Training Wald 10252 16-20in (For 1in Frames)Safety during wobbly rides Wald training wheels provide security and confidence to any childs bike while helping them develop balance skills. Wald 10252 training wheels are designed for use with bicycles with 16 20" wheels and wider chainstays up to 1. 25" diameter. Durable training wheels that provide security and confidence 5. 5" diameter plated steel wheels with rubber tread Designed to mount on bicycles with 16 to 20" wheel sizes Wald training