Abstract: An axially segmented brake arrangement in a hub-shaped planetary gear wheel head for a driven axle has a sleeve which couples the two central shaft sections nonrotatably together so that the sun wheel section can be replaced or be interchangeable to enable sun wheels of different diameters to be used even once the brake has been assembled. The sleeve which serves this function is connected by a web to a rim or spur gear located radially outwardly of the sleeve at the level of the planet gear shaft, this spur gear carrying the internally toothed brake disks of a stack of such disks interleaved with externally toothed disks engaging an internally toothed hollow shaft meshing with the planet gears, surrounding the brake disk stack and carried by a hollow shaft carrier which receives the power assist mechanism for the brake and is mounted on a hollow axle extending into the hub forming housing which is connected to the planet carrier.