Why is the Veloped stated to be a three-wheeler, but it has four wheels?

The Veloped, a mobility aid designed with four wheels, is often referred to as a 3-wheeler due to its unique design, which includes a double front wheel. This design, offering added stability and manoeuvrability, has made it a popular choice among individuals with mobility issues, caregivers, and healthcare professionals seeking a versatile, easy-to-use solution that can go over uneven terrain. 

The two front wheels are part of the Trionic Front Wheel Climbing technology. A patented solution which takes you over uneven terrain with a fraction of the force you would need with a regular one if it is even possible. However, the two front wheels work closely together and are considered to be one support point in the overall design.