Baby stroller is related to the baby’s life safety. If you choose a stroller with poor quality, your baby’s life may be endangered. The most critical position of the stroller is the wheels of the stroller. So what kind of wheels should the stroller choose?
Now let’s analyze the classification and performance of baby stroller tires
Materials are generally divided into the following three types: EVA foam wheel, PU (foam) wheel and rubber wheel. Generally speaking, rubber wheel >pu wheel >eva foam wheel, let’s take a look:
EVA foaming wheel
EVA is made of ethylene vinyl acetate copolymer (also known as ethylene vinyl acetate copolymer) by copolymerization of ethylene (E) and vinyl acetate (VA). The so-called foaming is to produce gas through physical and chemical foaming methods to make plastic foam. This type of wheel has good toughness, high temperature resistance, wear resistance and fire resistance. But its stability and shock absorption function are not good.
PU wheel
PU wheel is also known as PU filling wheel. Strictly speaking, Pu is also a kind of plastic. Only additives are added in the production process, which leads to better performance. Of course, the production cost also increases. When PU foam is dissolved into gel and poured into the model for heating to make it foaming, the surface of the finished product is smooth. After a long time of use, it will slowly turn yellow and corrode. It has certain shock absorption, stability and good elasticity.
Rubber wheel
Rubber is a highly elastic polymer material with reversible deformation. It is elastic at room temperature and can produce large deformation under the action of small external force. It can be restored to its original state after removing the external force. Solid rubber tire has good skid resistance and balance force, and is stronger than EVA wheel in terms of cushioning and shock resistance. The anti-skid effect is very good, and the balance force is also very good. The most important thing is that such a wheel can enhance its damping function during use.
Tire material performance ranking
The most important thing of the wheel is to look at the wear resistance, shock absorption, skid resistance, elasticity and service life. We can look at the cost and weight in addition.
Wear resistance: rubber wheel >eva foaming wheel >pu wheel
Shock absorption: rubber wheel >pu wheel >eva foam wheel
Skid resistance: rubber wheel >eva foam wheel >pu wheel
Elasticity: PU wheel > rubber wheel >eva foam wheel
Service life: rubber wheel >pu wheel >eva foam wheel
Cost: rubber wheel >pu wheel >eva foam wheel (expensive → cheap)
Weight: rubber wheel >pu wheel >eva foam wheel
From the above comparison, it can be seen that the rubber wheel material is superior to the other two materials in terms of shock absorption, service life and other aspects, but it also has obvious disadvantages: heavy weight and high price. Pu wheels are in good rate mainly because they have good resilience, so they have a certain shock absorption effect. Don’t ignore the shock absorption effect. The shock absorption directly affects the baby’s state in the car. If the shock absorption effect is poor, it is easy to wake up the sleeping baby, on the uneven road or cause adverse effects on the newborn baby’s spine. EVA foam wheel is preferred by most businesses, especially the portable umbrella car. It is the lightest and has certain wear resistance. For businesses, its cost performance is higher than the previous two.
In addition to the material of the wheel itself, its size also needs to be considered. The large size generally has better stability, which is suitable for young months. The small size is generally common in umbrella cars, which has low shock absorption and poor stability, and is suitable for babies who can sit and stand independently.
