Why do tractor front tyres wear fast?

Many owners find the front tyres worn out while the rears are still fine. There are a few common causes, and most can be prevented with checks.

1. Wrong front–rear ratio (4WD)

On 4WD tractors the front axle is designed to turn slightly faster than the rear. The difference must be small. If the wrong front or rear size is fitted, the fronts constantly scrub and wear quickly, especially on hard ground and roads with front drive engaged. See the 4WD front–rear ratio guide.

2. Front drive left on the road

Leaving front drive engaged on hard surfaces stresses front tyres and driveline even with the right ratio. Engage it in the field when needed and disengage on the road.

3. Toe-in setting

If the front wheels point inward or outward too much, the tyre scrubs sideways as it rolls. One edge wears faster or a saw-tooth pattern appears. Have the front alignment checked by a workshop.

4. Wrong pressure

• Low pressure wears the shoulders.
• High pressure wears the centre.
• With a front loader, front tyres carry more load and may need more pressure.

See tractor tyre pressure.

5. Load and use

Heavy front implements or ballast, frequent sharp turns and long loaded road trips shorten front tyre life. See tractor weight and ballast.

Checklist

• Are front and rear at factory sizes with a suitable ratio?
• Is front drive off on the road?
• Is wear on one edge, in the centre, or wavy?
• Is pressure checked regularly?