Heavy metal fans look no further: the metal in this test will really get your head nodding! We took six of the most heavy-duty six-inch sussers on the market out to the Alps and gave them a devil of a hiding. Only one received the top mark - of Cain - WARNING EXTRA LARGE FILE

With singlespeed sneaking out of its niche and hardtails carving their own, manufacturers are combining geared bikes with one-speed machines. Transformable bikes are a distinct possibility, but can anyone really make a great singlespeed in disguise?