The John Deere 6120R tractor tire size is front 12.4R24 and the rear is 18.4R34.
Front tire12.4R24
Rear tire18.4R34
Front/rear setupDifferent front and rear tire sizes
Tire pressure30 PSI, 14 PSI
Rim diameter24 in front, 34 in rear
John Deere 6120R Tire Size Details
Front tire size
12.4R24
Rear tire size
18.4R34
Front/rear setup
Different front and rear tire sizes
Original factory tire size
Front 10.00-16, Rear 18.4R34
Replacement tire size
Front 16.9-30, Rear 10.00-16
R1 ag tire size
12.4R24, 16.9R30
Front tire construction
Imperial radial
Rear tire construction
Imperial radial
Front section width
12.4 in
Rear section width
18.4 in
Front rim diameter
24 in
Rear rim diameter
34 in
Tire pressure
30 PSI, 14 PSI
Tire Size Comparison Chart
Front rim diameter comparison
This model
24 in
Average
17.1 in
Low
4 in
High
50 in
Rear rim diameter comparison
This model
34 in
Average
25.5 in
Low
0 in
High
50 in
John Deere 6120R Extra Tire Notes
Tire size note
The John Deere 6120R uses different front and rear tire sizes in this data: front 12.4R24 (24 in rim, 12.4 in width) and rear 18.4R34 (34 in rim, 18.4 in width)
Pressure note
For the John Deere 6120R with front 12.4R24 and rear 18.4R34 tires, the pressure values captured in the answer are 30 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 6120R data shows front 12.4R24 and rear 18.4R34. 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.
