Join Date: May 2013
Bikes: 2013 Cannondale SuperSix 5
My youngest girl is four next month as well. She's been riding without training wheels for about five months now, but she was an animal on the training wheels for a while before that. I don't believe in the balance bike vs. training wheels argument. The kid will ride when they are ready to ride. Some are six or seven, some are three.
I would instill a new rule that the helmet needs to be worn on the tricycle as well. Our kids wear helmets on everything: bike, trike, scooter, skateboard. That way there no fighting and they all know the rules. It also might make the bike more appealing vs. the trike.
FYI, my daughter learned on a 12" Walmart bike and now she alternates between that bike and her older brother and sister's 16" bikes. I don't care which one she feels like riding as long as she's riding and having fun.