A really lightweight bike won't win races on its own. But it's a good starting point – and a lighter bike is more fun to ride, too. For the junior whippet in your family, the Phenix 240 C:62 SLX ticks all the right boxes. Its lightweight carbon frame and fork – perfectly proportioned for smaller riders – are just the beginning. We chose light, tough Newmen Evolution X.A.25 wheels shod with Schwalbe Rocket Ron 2.1in tyres for quick acceleration. Powered them with Sram NX Eagle 1x11 gears. And added child-proportioned handlebars, grips and brake levers – connected to powerful Magura MT4 hydraulic discs – for perfect race day control, whatever the conditions. All that's left is to pedal... and win!