Comparison 4BABY Rapid vs Cybex Callisto

— Book folding system. In pushchairs, this system involves connecting frame parts along a common axis, resembling closing book pages when folded. Despite being somewhat more complex and heavier than umbrella pushchairs, book system offer versatility, suitable for various pushchair types. They work well with both walking seat units and carrycots, accommodate different handle types easily, and significantly reduce height when folded, unlike umbrella structures.

— Umbrella folding system. In the unfolded position, the frame of a pushchair, with its umbrella mechanism, appears as a front wheel support inclined backward, extending to a top handle, and a rear wheel support attached to it, standing vertically. During folding, the rear support pivots at the attachment point and aligns with the front support. Unlike book folding system, the front support remains rigid and doesn't fold independently. Umbrella pushchairs got their name from the handle — which is curved, like an umbrella handle.
The advantages of this type of mechanism are low weight, low cost and quick unfolding/folding. On the other hand, the umbrella structure is not well suited for carrycots, which is why it is used mainly in pushchairs and individual universal models. In addition, curved handles are somewhat less convenient than solid handles (the latter are also found in similar designs, but much less frequently).

The presence of a separate crotch strap in the design of the stroller. Only pushchairs with a bumper (see above) are equipped with such a strap: it is located vertically between the legs of a seated kid, preventing him/her from falling out by slipping under the bumper. In general, this design is similar in purpose to three-point harnesses (see “Harness type”), however, in a stroller with a bumper and crotch strap, the child is usually less crowded. You should pay attention to the presence of this function when buying pushchairs.

A window made of transparent or translucent material, built into the hood that covers the cradle or seating unit. In the version with a walking block, the viewing window is usually located so that the parent can see the baby directly while moving, without being distracted from controlling the stroller. In cradles, the parent can see the child through a window by approaching the stroller from the side of the hood (that is, on the opposite side of the handle); implementations with a window in the front hemisphere of the hood are less common. In addition, a baby lying in a cradle can usually see the outside world through the window (primarily the sky above the stroller). The viewing window can be made in the form of oilcloth or a mesh mosquito net, through the holes of which air freely penetrates, but insects and small debris raised by the wind are retained.

The depreciation theme is designed to absorb shocks and bumps from uneven road surfaces. The most popular nowadays are models with spring systems; you can also meet the shock absorption of the articulated and double types, and in quite a large number of pushchairs this function is absent at all. Here are the main features of each option:

— Spring type. Depreciation systems based on classical springs mounted on individual wheels. They are used in all types of pushchairs except classic pushchairs (see "Design"). The simplest models use a single set of springs, while more advanced models may include additional comfort features such as SAS shock/vibration absorption technology. Whatever the case, depreciation systems of this type are simple yet practical, efficient and reliable.

— Articulated type. The type of depreciation used in pushchairs with carrycots - classic, universal, transformers. The frame, on which the carrycot or seat unit is installed, in such models is attached to the base of the pushchair with the help of special bridges, which play the role of depreciation. As bridges can be used belt hinges, such systems can also refer to the articulated. Anyway, this type of depreciation is excellent for carrycots. First of all, the pushchair is as smooth and soft as possible, which contributes to the comfort and deep sleep of the child (and the parent to...drive the pushchair is much easier, especially on uneven surfaces). Secondly, the carrycot on such a pushchair can be rocked back and forth, lulling the baby. On the other hand, such systems are poorly suited for pushchair frames with swivel front wheels; and the failure of one absorber leads to tilting of the carrycot.

— Double. This term most often refers to the spring systems described above with additional shock absorbers on the frame of the pushchair. Such systems help to maximize vibration reduction and can approach articulated systems in terms of efficiency (see above). On the other hand, the softness of the suspension can be inconvenient when overcoming curbs and other bumps: to raise the front wheels of the pushchair, you have to press hard on the handle.

— Is absent. Pushchairs without depreciation are not suitable for uneven surfaces: in such conditions, the pushchair will be shaken violently, which creates both discomfort for the baby and inconvenience for the parent. On the other hand, such models have advantages over pushchairs with depreciation. First, due to the lack of unnecessary parts, they are much cheaper, and the design itself is as simple as possible and at the same time reliable. Secondly, without depreciation, it is easier to overcome curbs and other obstacles: to raise the front wheels, it is enough to push a small pressure on the handle. Thirdly, such pushchairs rock less on smooth, wave-like uneven surfaces.

Possibility to adjust the stroller handle in height. This function allows you to optimally adjust the length of the handle to the height of the parent. It will be especially useful if the parents are of different heights, and each of them regularly carries a stroller.

Typically, height adjustment is carried out by lowering or raising the upper segment of the handle, and in advanced implementations a telescopic mechanism is responsible for it. The retractable handle makes the stroller more adaptable to different situations and conditions. For example, it can be lengthened for more comfortable walking or shortened for ease of use in tight spaces.

The main material from which the frame of the pushchair is made.

— Aluminium. The material used in the vast majority of modern pushchairs of all price categories. This is due to a number of advantages: aluminium is light and at the same time durable, it does not rust and is not afraid of moisture, it lasts a long time, it looks nice, but it is relatively inexpensive — somewhat more expensive than steel, but noticeably cheaper than more advanced materials like carbon.

— Steel. Steel frames are as strong as aluminium frames, and they are much cheaper. On the other hand, they are quite heavy, so steel is used less often in pushchairs.

— Magnesium alloy. Premium Material: Stronger and more durable than aluminium, just as lightweight, but at a significantly higher cost. It is extremely rare, in single models of expensive pushchairs.

— Carbon. Another high-end material: carbon fiber filled with plastic. This combination gives excellent strength - comparable to steel — at a very low weight. However, carbon is very expensive, and these advantages are rarely decisive for pushchairs — in most cases simpler materials are enough. That is why carbon frames have not become widespread.

— Plastic. Plastic itself is easy to manufacture and relatively cheap; it is also not as cold to the hands in cool weather as aluminium or steel. However, modern pushchairs very rarely have frames made of this material. The fact is that low-cost vari...eties of plastic are not strong enough for this; and high-quality varieties cost accordingly - their price is close to aluminium, or even higher.

— Fibreglass. In this context, "fibreglass" typically refers to glass fibers mixed with plastic filler. Unlike conventional window glass, glass fibers are flexible and strong. The plastic filler enhances durability by offering scratch and tear resistance. The result is a material that is lightweight and very strong. However, fibreglass is prone to brittleness, especially with point impacts, and is susceptible to abrasion. As a result, it isn't widely used in pushchairs.

Pushchairs in which the rear wheels are mounted on completely separate stands, without any additional bridge between them.

The main advantage of rear wheels without an axle is that the legs of the parent following the stroller do not touch the bridge between the wheels. In addition, this feature slightly increases the mobility (allows the stroller to pass between the wheels lying on the road objects, without clinging to them with the axle).

The material from which the rims in the wheels of the pushchair are made. The reliability of the wheel and its resistance to deformation largely depend on the material of the rim.

— Plastic. Plastic rims are lightweight and cheap. They are not as strong as metal, but in most cases even such a relatively low strength is enough. Therefore, this material is most often used in pushchairs.

— Metal. The main advantage of the metal is its high strength: such a rim is able to withstand higher loads than a similar plastic one. On the other hand, it will weigh more and cost more. Therefore, metal rims are less common than plastic ones, mainly in rather expensive pushchairs.

The diameter of the rear wheels installed in the stroller.

The larger the wheel — the better it overcomes obstacles and bumps, the more convenient it is to drive the stroller over mud, snow and other difficult surfaces. For the rear wheels these moments are most relevant: for example, when driving the stroller over obstacles, it is usually tilted towards itself, so that the front wheels are in the air, and the rear wheels have to overcome the obstacle. On the other hand, small wheels weigh less and are easier to move, they are better suited for flat surfaces. So choose a stroller on this indicator should take into account the roads on which it has to be driven. If you plan to move on flat floors, good asphalt and stroller ramps — it is worth choosing small wheels, up to 20 cm. For difficult terrain, driving on mud and snow, regular overcoming steps and curbs it makes sense to pay attention to wheels in 30 cm and larger. And the diameter of 20 — 30 cm is an average option — it is suitable if you have to ride mainly on flat surfaces, but occasionally there is a need to overcome obstacles.