the seat can be easily adjusted for comfort and for those who are too short or too tall for the bike. we don’t think about opportunity costs and instead there is all kinds of other things that drive us. gabby:i think those are the most common ones that i would use. folks, i don't know why this world is full of predators, but it is; always have been, always will be. and yes the pockets were needed! but you can also run them on the track, too. 