My friend, who is a very good rider, complains about how trials is a lot tougher for shorter riders. He's not that short, though, about 5'7. But everytime we are watching a trials video, he becomes amazed at some crazy move, then he talks about how tall the guy is. Yea, he's probably making some excuse as to why he cant pull the same move, but is there any truth in this? Are there any short guys who are world class trials riders? I'd like to show him the video. Thanks.