16 wheeled kids bikes are perhaps one of the most common sizes that parents choose for kids aged approx 5yrs and up this is the point that your child will really get to grips with life on two wheels weve kept things as simple and as fun as possible so that your child only has to concentrate on enjoying themselves shortened 102mm cranks junior specific stem and grips and grippy little pedals mean the bike will fit perfectly all this and weighing just 63kg