When evaluating tractor dump trailers, prioritize the load capacity (payload) and hydraulic system efficiency. Ensure the trailer uses high-tensile steel (e.g., Q345B or Hardox) for the body to prevent denting under heavy loads. Check the tipping angle, which should be at least 45 to 50 degrees to ensure complete discharge of sticky materials like clay. Additionally, verify the axle configuration (single, tandem, or triple) based on your terrain; tandem axles with walking beams offer superior stability on uneven agricultural land.