The John Deere 4040 tractor tire size is front 9.5L-15 and the rear is 16.9-38.
Front tire9.5L-15
Rear tire16.9-38
Front/rear setupDifferent front and rear tire sizes
Tire pressure30 PSI, 14 PSI
Rim diameter15 in front, 38 in rear
Ballast104 lb, 3.5 lb
John Deere 4040 Tire Size Details
Front tire size
9.5L-15
Rear tire size
16.9-38
Front/rear setup
Different front and rear tire sizes
Original factory tire size
Front 9.5L-15, Rear 18.4-38
Replacement tire size
Front 11.00-16, Rear 18.4-38
R1 ag tire size
11.00-16, 10.00-16, 18.4-38, 16.9-38
Front tire construction
Bias/imperial tire
Rear tire construction
Bias/imperial tire
Front section width
9.5 in
Rear section width
16.9 in
Front rim diameter
15 in
Rear rim diameter
38 in
Tire pressure
30 PSI, 14 PSI
Loaded rear tire ballast / fluid capacity
104 lb, 3.5 lb
Tire size alternatives / conversions
9.5L-15, 11L-15, 18.4-38, 420/85R34, 16.9R34
Tire Size Comparison Chart
Front rim diameter comparison
This model
15 in
Average
14.8 in
Low
6 in
High
28 in
Rear rim diameter comparison
This model
38 in
Average
22.2 in
Low
6 in
High
38 in
John Deere 4040 Extra Tire Notes
Tire size note
The John Deere 4040 uses different front and rear tire sizes in this data: front 9.5L-15 (15 in rim, 9.5 in width) and rear 16.9-38 (38 in rim, 16.9 in width)
Pressure note
For the John Deere 4040 with front 9.5L-15 and rear 16.9-38 tires, the pressure values captured in the answer are 30 PSI, 14 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Ballast note
For the John Deere 4040 rear 16.9-38 tires, the ballast figure captured in the answer is 104 lb, 3.5 lb. Liquid ballast capacity can change by tire brand, fill percentage, wheel setup and ballast fluid type
Front/rear matching note
The John Deere 4040 data shows front 9.5L-15 and rear 16.9-38. 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.
