In a relaxed position, you should be able to extend your leg and touch the pedal at its lowest point with the heel of your foot. If you can't, the bike is probably too big for you. Under demanding riding conditions, you will want to be able to quickly reach the ground when necessary. Fit yourself for personal seat height. Assist others in being fit for seat height.
Students can time themselves putting on their helmet and mounting the bike.
This can also be a cooperative game in fitting others. A challenge could be partners racing for the best time with helmets properly fit. For maximum participation, students are encouraged to bring their own bike. If the student can not bring bike or does not own one, they may share with a partner, preferably of the same size. The student will be able to properly fit their helmet.