The John Deere 9400T tractor tire size is front 710/70R38 and the rear is 18.4R38.
Front tire710/70R38
Rear tire18.4R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure14 PSI, 16 PSI
Rim diameter38 in front/rear
John Deere 9400T Tire Size Details
Front tire size
710/70R38
Rear tire size
18.4R38
Front/rear setup
Different front and rear tire sizes
R1 ag tire size
18.4R26, 24.5R32
Front tire construction
Metric radial
Rear tire construction
Imperial radial
Front section width
710 mm
Rear section width
18.4 in
Front aspect ratio
70%
Front rim diameter
38 in
Rear rim diameter
38 in
Approx front overall diameter
about 77.1 in
Tire pressure
14 PSI, 16 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
38 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
38 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 9400T Extra Tire Notes
Tire size note
The John Deere 9400T uses different front and rear tire sizes in this data: front 710/70R38 (38 in rim, 710 mm width) and rear 18.4R38 (38 in rim, 18.4 in width)
Pressure note
For the John Deere 9400T with front 710/70R38 and rear 18.4R38 tires, the pressure values captured in the answer are 14 PSI, 16 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Front/rear matching note
The John Deere 9400T data shows front 710/70R38 and rear 18.4R38. When changing either size, front/rear rolling circumference and lead/lag need to stay within the correct range
Official information note
Mistakes do happen. Tire sizes can change by year, axle, wheel/rim option, tyre brand, tread type and local market. Please check the tire sidewall, operator manual and official deere.com website for official information.
