The John Deere 4450 tractor tire size is front 18.4-38 and the rear is 18.4-38.
Front tire18.4-38
Rear tire18.4-38
Front/rear setupSame front and rear tire size
Tire pressure24 PSI, 12 PSI
Rim diameter38 in front/rear
John Deere 4450 Tire Size Details
Front tire size
18.4-38
Rear tire size
18.4-38
Front/rear setup
Same front and rear tire size
Replacement tire size
Front 10.00-16, Rear 18.4-38
R1 ag tire size
10.00-16, 18.4-38, 14.9-26
Tire construction
Bias/imperial tire
Section width
18.4 in
Rim diameter
38 in
Tire pressure
24 PSI, 12 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 4450 Extra Tire Notes
Tire size note
The John Deere 4450 uses 18.4-38 on both the front and rear in this data, so the same tire-size details apply to both axles: bias/imperial tire, 18.4 in section width, 38 in rim
Pressure note
For the John Deere 4450 with front 18.4-38 and rear 18.4-38 tires, the pressure values captured in the answer are 24 PSI, 12 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 4450 data shows the same tire size front and rear (18.4-38). That usually makes the visible front/rear size relationship simpler, but approved tire and wheel combinations should still be checked before mixing brands or changing sizes
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.
