Split wheel rim for an all terrain vehicle

A wheel rim unit includes first and second rim bodies (31, 32) interconnected fixedly by a plurality of bolts (41) and a plurality of nuts (42). The first and second disks (311, 321) abut against each other. The second disk (321) is formed integrally with a plurality of pressed bushings (324) that define respectively a plurality of holes (323) in the second disk (321) and that extend respectively through a plurality of holes (313) in the first disk (311) so as to position the first and second rim bodies (31, 32) relative to each other. The bolts (41) extend respectively through the holes (313, 323) in each of the first and second disks (31, 32), and engage respectively the nuts (42).