A device for steerable suspension of a vehicle wheel

A steerable rear suspension for a tractor (100) includes a suspension arm (104, 106) pivotally coupled to the chassis (102) of the tractor (100) and a steerable planetary gear system (120) fixed to the suspension arm (104, 106). The gear system (120) comprises a first housing section (166) bolted to an associated suspension arm (104, 106); a second housing section (168) pivotally coupled to the first housing section (166) to pivot about a substantially vertical axis (176); and a third housing section (170) rotatably supported on the second housing section (168) and enclosing a planetary gear train.