The invention comprises a bearing (4) and its methods for mounting, dismounting and adjusting a bearing clearance. The bearing (4) comprises an outer ring (6), rolling elements (5) and a two-part inner ring (A). The two-part inner ring (A) comprises a first part (1) having a radially outer surface (11) and an inner bore (12). Furthermore, the two-part inner ring (A) comprises a second part (2) having a radially inner surface (21) and at least one raceway (22) for rolling elements. The radially outer surface (11) of the first part (1) essentially matches the radially inner surface (21) of the second part (2). A cavity (3), which in use acts as a pressure chamber, is located between the first and second parts (1, 2). When pressurizing the cavity (3), a relative axial movement between the first and second parts (1, 2) is accomplished.