The 16" torker unicycle is best for children 1st through 4th grade. This is the most popular school brand and holds up to the heavy use of children learning to ride. The seat has carbine bumpers to protect the seat from frequent drops; the tire is of standard size for easy replacement when needed. The bearings, fork and spokes are superior to other brands on the market. To read more on learning to ride and starting a school club visit our Web site www.unicycleclub.com. Parents and teachers of children in unicycle clubs find their kids have benefited physically, socially, academically, as well as behaviorally. Best wihes to the purchaser of this unicycle.