The John Deere 9620RX tractor tire size is front 600/70R30 and the rear is 800/70R38.
Front tire600/70R30
Rear tire800/70R38
Front/rear setupDifferent front and rear tire sizes
Rim diameter30 in front, 38 in rear
Ballast75 gal
John Deere 9620RX Tire Size Details
Front tire size
600/70R30
Rear tire size
800/70R38
Front/rear setup
Different front and rear tire sizes
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
600 mm
Rear section width
800 mm
Front aspect ratio
70%
Rear aspect ratio
70%
Front rim diameter
30 in
Rear rim diameter
38 in
Approx front overall diameter
about 63.1 in
Approx rear overall diameter
about 82.1 in
Loaded rear tire ballast / fluid capacity
75 gal
Tire size alternatives / conversions
480/85R38, 650/85R42, 520/85R38, 710/70R42
Tire Size Comparison Chart
Front rim diameter comparison
This model
30 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 9620RX Extra Tire Notes
Tire size note
The John Deere 9620RX uses different front and rear tire sizes in this data: front 600/70R30 (30 in rim, 600 mm width) and rear 800/70R38 (38 in rim, 800 mm width)
Ballast note
For the John Deere 9620RX rear 800/70R38 tires, the ballast figure captured in the answer is 75 gal. Liquid ballast capacity can change by tire brand, fill percentage, wheel setup and ballast fluid type
Front/rear matching note
The John Deere 9620RX data shows front 600/70R30 and rear 800/70R38. 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.
