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Wheeled Tractor Ballast Calculator

This tool was developed by Clemson University and Michelin North America to help farmers, tire dealers, and agricultural professionals calculate optimal tractor ballast for peak tire performance. (...click for more)


Background Information








This section optional (for reference if pdf generated)

Tractor Information


Note: Engine power estimated as PTO power / 0.85.

Note: PTO power estimated as 0.85 x Engine power.

Allowable range: 4-7 mph.


tractor schematic

Scale Weights and Adjustments



Target Weights:
  • Front axle: xxxxx lb xx%
  • Rear axle: xxxxx lb xx%
  • Total tractor: xxxxx lb total weight
Note: Target weights are before adding implements.
Weight to efficiently transmit torque: xxx lb per PTO-hp
Current weights:
  • Front axle: xxxxx lb
  • Rear axle: xxxxx lb
  • Total tractor: xxxxx lb
Adjustments required:
  • Front axle: xxxxx lb
  • Rear axle: xxxxx lb
  • Total tractor: xxxxx lb
Cast iron weights highly recommended for ballast.

Output this Report


APA Citation:
M. Crouch, D. Graden, J. Gustafson, K.R. Kirk, F. McAlhany, S. Rosen, A.P. Turner, and J. Widenhoefer. (2025). Wheeled Tractor Ballast Calculator. Clemson University Center for Agricultural Technology. Retrieved from https://www.clemson.edu/extension/agronomy/PrecisionAgriculture/calculators/

(c) 2025 Clemson University Center for Agricultural Technology (CU-CAT) and Cooperative Extension

Disclaimer: This calculator is brought to you as a free service by Clemson University Center for Agricultural Technology and Clemson University Cooperative Extension. The accuracy of the calculator is not guaranteed. User assumes all risks and liabilities from its use.

We are dedicated to making this a valuable tool for you. If you have suggestions for improvements, please contact us by email.