The John Deere 7800 tractor tire size is front 11.00-16 and the rear is 18.4R38.
Front tire11.00-16
Rear tire18.4R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure24 PSI, 44 PSI, 12 PSI, 14 PSI
Rim diameter16 in front, 38 in rear
John Deere 7800 Tire Size Details
Front tire size
11.00-16
Rear tire size
18.4R38
Front/rear setup
Different front and rear tire sizes
Replacement tire size
Front 18.4-42, Rear 18.4-42
R1 ag tire size
480/70R34, 420/85R30
Front tire construction
Bias/imperial tire
Rear tire construction
Imperial radial
Front section width
11 in
Rear section width
18.4 in
Front rim diameter
16 in
Rear rim diameter
38 in
Tire pressure
24 PSI, 44 PSI, 12 PSI, 14 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
16 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 7800 Extra Tire Notes
Tire size note
The John Deere 7800 uses different front and rear tire sizes in this data: front 11.00-16 (16 in rim, 11 in width) and rear 18.4R38 (38 in rim, 18.4 in width)
Pressure note
For the John Deere 7800 with front 11.00-16 and rear 18.4R38 tires, the pressure values captured in the answer are 24 PSI, 44 PSI, 12 PSI, 14 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 7800 data shows front 11.00-16 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.
