?High quality? High quality ABS wheels and high quality steel mounting arms. Our training wheel mounting arms are 3.0mm thick. For beginners, this means more safety and stability. ?Unique design? We are most concerned about the safety of our customers. The exercise bike has a small stand which is more stable and can help young students to cycle until they feel the balance of the bike, so you don’t have to worry about the safety of your children. ?Easy to install? Contains 2 x vertical support arms, 2 x wheels, 4 x nuts (2 spare nuts), 1 screwdriver, 1 spanner, 1 bicycle bell. Go and enjoy your first outdoor cycling exercise with your kids! ?UNIVERSAL? The bike stands are universally suitable for 12, 14, 16, 18, 20 inch bicycles. ?equipment? - Guide your child during the first trips thanks to a slot for the hands placed behind the saddle. Children’s bicycle training wheels are suitable for most bicycles with a speed of 12 "" to 20 “”. With horizontal rear fork ends, but not for