Why do tractors have huge rear tires?
Show answer & explanation
Answer: Prevent sinking in soft soil
Drive faster on highways — Wrong. Large agricultural tires actually limit speed. They're designed for traction in fields, not for highway speed.
Prevent sinking in soft soil ✓ — Correct! Large rear tires spread the tractor's weight over a greater area, lowering ground pressure. That keeps the machine from sinking into soft fields and reduces soil compaction, which protects soil structure and crop yields.
Carry heavy loads of crops — Wrong. Tire size isn't mainly about load capacity. Large tires spread weight to prevent sinking into soft soil, not to carry more cargo.