5,200 lb. Electric Brake Standard Spring Trailer Axle (89" Hub Face, 6-5.5" Bolt Circle) 5,200 lb Capacity, 6-5.5" Bolt Circle Axle seats will come loose with axle and are required to be welded onto axle. 3" diameter x 3/16" wall round tubing. Lubrication: Grease 12" x 2" Electric Drum Brakes (Some Assembly Required)