MK Martin Tractor Grain Cart

The MK Martin Gravity Box is designed for transporting and handling grain, seed, and other agricultural materials. Its large hopper capacity makes it suitable for high-volume farm operations and grain-handling applications.

This MK Martin lineup includes models ranging from approximately 320 to 1,200 bushels of capacity. The MK 3200 handles 320–450 bushels, the MK 5000 handles 500–605 bushels, the MK 6500 handles 645–800 bushels, and the MKGW12000 provides up to 1,200 bushels of capacity.

The available models range from approximately 96" to 115" in width. The MK 3200 is 96" wide, the MK 5000 is 101", and the MK 6500 is 115", while the larger MKGW12000 provides a higher-capacity configuration.

The gravity boxes use durable steel hopper construction designed for demanding agricultural applications. The MK 3200 uses 14-gauge steel, while the MK 5000, MK 6500, and MKGW12000 feature 12-gauge steel hoppers for heavier-duty use.

Tractor requirements vary by model and load configuration. The listed models are designed for tractors in approximately the 120–200+ HP range, with the larger-capacity MKGW12000 intended for tractors rated around 150–200+ HP.

Choose a MK Martin Gravity Box based on the amount of material you need to transport, tractor horsepower, available towing capacity, hopper size, and required operating width. Smaller models such as the MK 3200 are suitable for lower-volume applications, while the MK 6500 and MKGW12000 provide greater capacity for high-volume grain-handling operations.