ah man don't call them bicycles not as we know it there recumbents dont even resemble a proper bike. shinsplints is an issue with them i toured with an experience bent rider and it was he who told me of the problems, shinsplints and climbing .now in there defense they certainly can move fast no wind resistance or at least not as much as a proper bike.i never tried one and to be honest i have no intentions of even trying ,but each to there own .