the hub shell 2 to the top edge of the chamfer 15 with the radial play 8 reduced to this degree ease of insertion of the through axle 5 into the hub and into the sleeve 6 is ensured when mounted the operational distance 30 corresponds to half the radial play 8 in other words the distance 45 of the center axis 40 of the sleeve 6 from the center axis 41 of the bearings 4 a 4 b or from the through axle 5 to be inserted must be smaller than the radial extension of the chamfer 15 so as to allow the insertion end 14 to be introduced in the inner diameter 34 of the sleeve 6 by the chamfered edge 15 all of the embodiments in particular employ two radial spacer devices 7 which are axially spaced apart by a distance 19 the larger the distance between the radial spacer devices 7 from one another the smaller the risk of the sleeve tilting preferably the radial spacer devices 7 are provided as far as possible axially outwardly to establish defined conditions as illustrated in fig3 and 4 the radial spacer devices 7 may be configured as o rings 17 and axially secured in grooves 10 on the outside of the sleeve 6 or else it is conceivable for the radial spacer devices 7 to be an annular strip or the like extending around the sleeve 6.