The John Deere 9RX 830 tractor tire size is front 7.50-18 and the rear is 900/60R42.
Front tire7.50-18
Rear tire900/60R42
Front/rear setupDifferent front and rear tire sizes
Tire pressure35 PSI, 18 PSI
Rim diameter18 in front, 42 in rear
John Deere 9RX 830 Tire Size Details
Front tire size
7.50-18
Rear tire size
900/60R42
Front/rear setup
Different front and rear tire sizes
Original factory tire size
Front 900/60R38, Rear 900/60R42
R1 ag tire size
5.00-15, 11.2-24
Front tire construction
Bias/imperial tire
Rear tire construction
Metric radial
Front section width
7.5 in
Rear section width
900 mm
Rear aspect ratio
60%
Front rim diameter
18 in
Rear rim diameter
42 in
Approx rear overall diameter
about 84.5 in
Tire pressure
35 PSI, 18 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
18 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
42 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 9RX 830 Extra Tire Notes
Tire size note
The John Deere 9RX 830 uses different front and rear tire sizes in this data: front 7.50-18 (18 in rim, 7.5 in width) and rear 900/60R42 (42 in rim, 900 mm width)
Pressure note
For the John Deere 9RX 830 with front 7.50-18 and rear 900/60R42 tires, the pressure values captured in the answer are 35 PSI, 18 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 9RX 830 data shows front 7.50-18 and rear 900/60R42. 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.
