The 50 cm. Extent Mountain Bike is the chance for your child to really experience mountain biking for the first time. With a gusseted steel frame, front disc and suspension fork, your child will be attacking the trails with confidence, the biggest problem you will have is trying to keep up! 6-speed MircoShift twist shift gears will help your child tackle the climbs, whilst real knobby mountain bike tyres will provide grip in the woods.