When he was 13 Chris Boardman, who would later transform British cycling, asked his parents if he could compete in a 10-mile race. They were worried that the “challenge, difficulty and pain” would be too much for the boy. But they were wrong. Chris, a dyslexic who wasn’t enjoying school and who says “I didn’t have a lot of self-esteem”, had found his perfect world. He was stoical and patient. He loved the way he could plan and quantify tiny improvements. Meanwhile, in Scotland, a wild card called Graeme Obree was conducting weird experiments on his bike. Two nerdy misfits, two rivals, two ways of thinking about the world, very nicely told.