The Case IH STX440 tractor is listed with a 20.8R42 front tire and a 20.8R42 rear tire.
Case IH STX440 Tire Size Chart
Configuration
Tire size
Agricultural front
20.8R42
Agricultural rear
20.8R42
Recommended tire pressure
The recommended minimum PSI for the front tires on a Case IH STX440 with IF 800/70R38 is 9 psi; and for the rear tires it is 6 psi.
Before buying replacement tires
Match the complete sidewall size, rim diameter, axle position, 2WD/4WD configuration and tire type before ordering. On driven front axles, changing overall tire diameter can upset the required front-to-rear rolling ratio.
Tire Pressure
Recommended tire pressure: The recommended minimum PSI for the front tires on a Case IH STX440 with IF 800/70R38 is 9 psi; and for the rear tires it is 6 psi.
Pressure warning: Confirm the correct pressure in the official operator’s manual and the tire manufacturer’s load-and-pressure chart before inflation.
Wheelbase and Ground Clearance
Wheelbase
154 inches 391 cm
Specification disclaimer
These specifications are provided as a reference and may vary by production year, country, axle, wheel package and previous tire changes. Before purchasing, fitting or inflating tires, confirm the specifications using the Case IH official U.S. website, the official operator’s manual and the markings on the tires currently fitted.
