The John Deere 9520T tractor tire size is front 800/70R38 and the rear is 30.5L-30.
Front tire800/70R38
Rear tire30.5L-30
Front/rear setupDifferent front and rear tire sizes
Rim diameter38 in front, 30 in rear
Ballast50 gal
John Deere 9520T Tire Size Details
Front tire size
800/70R38
Rear tire size
30.5L-30
Front/rear setup
Different front and rear tire sizes
R1 ag tire size
30.5L-32, 30.5L-30
Front tire construction
Metric radial
Rear tire construction
Bias/imperial tire
Front section width
800 mm
Rear section width
30.5 in
Front aspect ratio
70%
Front rim diameter
38 in
Rear rim diameter
30 in
Approx front overall diameter
about 82.1 in
Loaded rear tire ballast / fluid capacity
50 gal
Tire size alternatives / conversions
800/70R38, 900/60R38
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
30 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 9520T Extra Tire Notes
Tire size note
The John Deere 9520T uses different front and rear tire sizes in this data: front 800/70R38 (38 in rim, 800 mm width) and rear 30.5L-30 (30 in rim, 30.5 in width)
Ballast note
For the John Deere 9520T rear 30.5L-30 tires, the ballast figure captured in the answer is 50 gal. Liquid ballast capacity can change by tire brand, fill percentage, wheel setup and ballast fluid type
Front/rear matching note
The John Deere 9520T data shows front 800/70R38 and rear 30.5L-30. 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.
