My message Close
Kids vary massively, and by the time they're on a 26" wheel you better get it right because they are getting more and more expensive... If you're unsure, sitting on a bike is the best guide but if you can't, or if it's for a surprise, then you'll generally be safe working on a 26" wheel kids bike for most tall 10 or average 11 year olds with a height starting about 4'11".