Aftermarket spindle bearings, replaces John Deere Spindle bearings GX20818 or GX21510. These bearings are sealed (metal seal) on both sides. John Deere GX21510 lower bearing is sealed on one side, open on the other side. John Deere number for the upper bearing, GX20818 is a bearing sealed on both sides. Both bearings are the same size.
Item# : SPM573038614
Model # : 7917