My son's bike riding problems are the same. We have a balance bike, small bike with training wheels and a larger bike. Last week he made a new friend in the neighborhood, a boy one year younger that had just moved here. The four year old was zipping all around on our small bike with the training wheels. DS tried and tried and couldn't make it go at all.

It was the first time I saw concern on his face about his differences. He has had a really good attitude about not being as fast or strong as his friends. He usually just shrugs and says "I am not very good at -----, lets do this instead"

A note on chiropractic: my SIL is a pediatrician and very mainstream. She had a patient with recurring ear infections. The kid's mom decided to take the kid to a chiropractor. My SIL was skeptical but wished them the best. The kid hasn't had an ear infection since.

Hope it works for you.