The John Deere 8RX 490 tractor tire size is front 480/80R50 and the rear is 600/70R30.
Front tire480/80R50
Rear tire600/70R30
Front/rear setupDifferent front and rear tire sizes
Tire pressure24 PSI, 44 PSI, 12 PSI, 14 PSI
Rim diameter50 in front, 30 in rear
John Deere 8RX 490 Tire Size Details
Front tire size
480/80R50
Rear tire size
600/70R30
Front/rear setup
Different front and rear tire sizes
R1 ag tire size
18.4R42, 14.9R30
Front tire construction
Metric radial
Rear tire construction
Metric radial
Front section width
480 mm
Rear section width
600 mm
Front aspect ratio
80%
Rear aspect ratio
70%
Front rim diameter
50 in
Rear rim diameter
30 in
Approx front overall diameter
about 80.2 in
Approx rear overall diameter
about 63.1 in
Tire pressure
24 PSI, 44 PSI, 12 PSI, 14 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
50 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 8RX 490 Extra Tire Notes
Tire size note
The John Deere 8RX 490 uses different front and rear tire sizes in this data: front 480/80R50 (50 in rim, 480 mm width) and rear 600/70R30 (30 in rim, 600 mm width)
Pressure note
For the John Deere 8RX 490 with front 480/80R50 and rear 600/70R30 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 8RX 490 data shows front 480/80R50 and rear 600/70R30. 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.
