In the evidence of this, racing bikes - no, riding bikes - is butt-blistering, ball-bruising hard work. You know all those car racing conventions you%26rsquo;ve ingrained into your consciousness? Forget all of them. That one that says you can brake and turn at almost the same time to skid through a corner sideways for maximum style and speed means jackshit here. And the one which guarantees that you can easily correct a momentary wobble of the steering wheel with the minimum of fuss and not have a major spine-shattering accident doesn%26rsquo;t apply with bikes.