Classic Bikes Frameset
Buying advice for: Child / youth: Frameset
Frame material
Frame materials used for children's bikes are generally similar to those used for adult bikes. The choice of frame material depends on various factors, including the age of the child, the type of bike (e.g. mountain bike, road bike, city or trekking bike) and personal preferences. Steel frames are robust, durable and relatively inexpensive. They offer good damping and are often slightly heavier than frames made of other materials. Steel frames are a popular choice for inexpensive children's bikes or for children who do not need to carry a lot of weight. Carbon fibre frames can also be found on children's bikes. They are light, stiff and offer high performance. Carbon fibre frames absorb vibrations well and offer a responsive ride. However, they are usually more expensive than steel or aluminium frames and are often used in higher-end children's bikes or for competition.
Frame types
Children's bike frames can vary depending on the type of bike and its intended use. Frames with a low step-through have a low overhang, which makes it easier for the child to get on and off. They are particularly suitable for smaller children or beginners as they reduce the risk of falling when getting on and off the bike. Specially developed frames made of lightweight material such as aluminium or carbon fibre can reduce the overall weight of the child's bike. Lighter frames make it easier for the child to manoeuvre and ride the bike, which is particularly important if the child wants to cover longer distances or take part in races. Frames with child-friendly geometry are designed to provide a comfortable and ergonomic riding position for children. They often have shorter top tubes and lower handlebars to promote an upright and stable riding position suitable for young riders. For children's bikes that are mainly ridden off-road or on uneven surfaces, frames with suspension systems may be available. These frames absorb shocks and vibrations, resulting in a more comfortable ride and reducing fatigue for the child. Some manufacturers offer frames that can grow as the child grows.
Geometry
The geometry of a children's bike plays a decisive role in the comfort, safety and performance of the bike. Children's bikes often have a lower overhang to make it easier for the child to get on and off. This reduces the risk of injury and makes it easier to control the bike, especially for younger children or beginners. A shorter top tube ensures an upright riding position, which improves the child's control and stability. This makes the bike feel more natural and comfortable for the child, especially on longer rides. The handlebar height should be appropriate to ensure a comfortable position for the child without them having to lean too far forwards. This promotes an ergonomic riding posture and reduces strain on the upper back and shoulders. The saddle should be positioned at a height that allows the child to pedal efficiently without having to stretch or bend their legs excessively. An appropriate wheelbase also ensures stability and balance, especially at slow speeds or when riding on uneven terrain.
Height
Crotch length is an important yardstick for frame size. To measure the stride length, the child can stand barefoot and be measured with a book between the legs at the groin. The stride length is the distance from the ground to the groin. Many bicycle manufacturers provide age and size guidelines for their children's bikes. These can serve as a rough guide, but it is important to consider the child's individual needs and preferences. It can also be useful to choose a bike with some room for growth so that the child does not outgrow the bike too quickly. Adjustable components such as the saddle can help to adapt the bike to the growing child.