Countless manufacturers have already tried their hand at the ultimate all-rounder. The motto is always: climbing as efficiently as on a cross-country bike, descending as efficiently as on a downhill bike. And it is precisely this maxim that the makers of "Black Math Bike" have taken up the cause. The mountain bike should have a real 2-in-1 character and, for example, adjust the suspension travel from 170 to 140 millimetres in no time at all. And that's not all.