Folding system
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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.
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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).
Fastening in the direction/against the movement
In strollers with this function, the seat unit can be fixed in one of
two positions, to choose from: facing the parent (against the direction of movement) or facing away from the parent (in the direction of movement). Each option has its advantages: in the first case, the baby can see a familiar face and is less nervous, and when located in the direction of movement, it is more convenient for him/her to view the world around him/her.
Viewing window
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.
Carrycot installation
The ability
to install a carrycot on the pushchair — a characteristic basket in which the baby can lie comfortably.
Carrycots are used mainly for very young kids (up to 6 – 8 months), who can not yet sit normally in seat units. And the possibility of installing such an accessory by definition is available in all universal pushchairs (see "Design"). Also, the replacement of the seat unit on the carrycot can be provided in pushchair models. In fact, such pushchairs are also universal – but they are not initially equipped with carrycots, and therefore belong to the category of pushchairs.
Car seat installation
The possibility
of installing a child car seat on the chassis of the stroller. This feature can be very useful on car trips: the car seat can be used both in the car and as a seat unit for a stroller, and the main seat unit can be left at home so that it does not take up space in the boot. Note that some models with this function are initially equipped with a suitable car seat; if it is purchased separately, you should pay special attention to compatibility with your stroller.
Handle height adjustment
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.
Rear wheels without axle
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).
Wheels
The type of wheels installed on the pushchair.
The most popular in our time are
rubber wheels, including
air-filled ones.
Plastic wheels are used mainly in inexpensive pushchairs to further reduce the cost, while
gel ones, on the contrary, are considered a very advanced option.
Polyurethane wheels and
EVA foam-filled wheels are also widely used. Here is a more detailed description of each of these varieties:
— Rubber. Rubber solid tires, found in many modern pushchairs, are popular due to their affordability, quiet operation, and smooth ride over bumps. While less effective on uneven surfaces compared to air-filled and gel wheels, solid rubber tires are cost-effective, low-maintenance, damage-resistant, and suitable for various wheel diameters, including small ones.
— Air-filled. Air-filled rubber tires, commonly featured on pushchairs, offer a softer ride and facilitate easy maneuvering on uneven surfaces and high curbs. Despite their higher cost, they require periodic maintenance to ensure proper pressure and protection against cuts or punctures. However, users find air-filled wheels manageable, as they are thick and less prone to damage.
— Plastic. Plastic wheels, commonly featuring both tire and rim made from this material (thou
...gh some have metal rims), are known for their simplicity and affordability. However, they lack durability, reliability, and effective vibration dampening due to their hardness. Typically found in low-cost pushchairs with small wheels designed for flat surfaces.
— Gel. Wheels similar in design to air-filled tires (see the relevant paragraph), but filled not with air, but with a special gel. The main advantage of this option is its insensitivity to small punctures and cuts: coming out, the gel in the tire in contact with air almost instantly solidifies, effectively sealing the damage. In addition, such wheels are virtually maintenance-free — they do not need to be inflated. The disadvantages of gel tires include high cost and somewhat higher rigidity than air-filled tires (although in terms of softness of running such wheels are still noticeably superior to rubber and even more so to plastic ones).
— Polyurethane. Solid polyurethane tires offer excellent maneuverability, shock absorption, puncture resistance, and durability. They are unaffected by extreme temperature changes and are cost-effective, making them a common choice for various pushchair types.
— EVA. Wheels made of microporous foam rubber, specifically EVA material, offer high elasticity, excellent cushioning, and wear resistance. Lightweight and puncture-resistant, these wheels provide a smooth pushchair ride. However, they may stiffen in cold winter weather.Front wheels diameter
The diameter of the front wheels installed in the stroller.
At the same time, the front wheels are not as important for mobility as the rear wheels: for example, to overcome obstacles, the stroller is often lifted "on its toes" by tilting it towards itself, with only the rear wheels working. Therefore, the diameter of the front wheels may be noticeably smaller than the rear wheels. It should be noted here that the small size also has its advantages — the wheels are lighter.
Speaking of specific numbers, diameter
up to 15 cm is considered very modest,
16 — 20 cm — small,
21 — 25 cm — medium,
26 — 30 cm is larger than average and
more than 30 cm is large.