The axle on which this tyre is recommended to be mounted.
In the vast majority of modern motorcycles, the
front wheel is steering, and the
rear wheel is driving; in addition, the rear wheel usually bears more weight. Accordingly, the features of the work of both axes will also be different. So, the front tyre has to turn in different directions along the course, and the rear one has to be subjected to increased loads in terms of weight and twisting along the main axis of rotation, in addition, it must “cling” well to the road in order to avoid slipping. In light of all this, putting tyres on a "non-native" axle is highly undesirable: it will work in an emergency mode, and the consequences can be very deplorable. At the same time, there are
universal models suitable for both the front and rear axles (although they can cost more than specialized ones, and at an equal cost, they can be inferior to them in terms of individual characteristics).