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The biggest advantage of a 4-wheel roller walker is its stability and safety, and it maintains balance even on uneven surfaces. Therefore, in most usage scenarios, a 4-wheel roller walker performs better than a 3-wheel model.

If the elderly do not use walking aid with wheels correctly or do not pay attention to obstacles in front of them when walking, they may fall. For example, when using walking aid with wheels, if the brakes are not used in time, the walker may suddenly slide, causing the user to lose balance.