Determining Maximum Ballast

IMPORTANT: Do not overload tires. If maximum weight shown in chart is not enough for safety, reduce load or install tires with more load capacity.

NOTE: For tractors with dual or triple tires, maximum ballast is not normally limited by tire carrying capacity.

Use appropriate ballast for a particular operating condition. Tractors should have only enough ballast to maintain safe steering control.

Adjust ballast as tractor use changes. For example, adjust ballast when changing from mounted to towed implements.

IMPORTANT: To extend drive train life and avoid excessive soil compaction and rolling resistance, avoid adding too much ballast. Never add ballast that results in continuous full-power loads below 6.6 km/h (4.1 mph).

Remove ballast if tractor engine labors when pulling heavy loads below 6.6 km/h (4.1 mph).

MAXIMUM LOAD PER WHEEL
Tire Size	Load Rating	40 km/h (25 mph)
710/70R38	166A8**	5300 kg (11700 lb)
800/70R38	173A8	6500 kg (14300 lb)
710/70R42	168A8	5590 kg (12320 lb)
20.8-42	10 Ply	3350 kg (7400 lb)
20.8R42	155A8**	3875 kg (8550 lb)
520/85R42	157A8	4125 kg (9100 lb)
620/70R42	160A8**	4500 kg (9910 lb)
620/70R46	162A8	4750 kg (10500 lb)
710/70R38	166A8	5300 kg (11700 lb)
18.4R46	155A8***	3875 kg (8550 lb)
480/80R46	158A8	4250 kg (9350 lb)
520/85R46	158A8	4250 kg (9350 lb)
480/80R50	159A8	4375 kg (9650 lb)
900/50R42	168A8	5600 kg (12300 lb)