Extra wheels for Trybike. The two-wheeled Trybike can easily be converted into a three-wheeled running bike. Part of Trybike's concept is that you can easily change the bike. If it turns out that a two-wheeler was too big a mouthful for a child, or if a little brother or sister arrives, the extra wheel can turn out to be quite indispensable. The wheels are of the same quality as those already on the bike.
