In tandems, the part that suffers the most are the wheels, especially the rear wheel. They are wheels that have to support twice the weight of a normal bicycle wheel and, especially in mountain tandems, where the roads are more irregular, the wheels suffer a lot. This is why we recommend always using a double suspension tandem for the mountains, since apart from absorbing the irregularities of the terrain saving work on the rear wheel, it also greatly improves the comfort and experience of the second rider.